Re: [MBZ] '86 SDL no a/c

Can someone (with an OM603) pull the connectors off their green coolant sensor and check if they are normally open? This is the sensor that sits next to the fuel filter where the coolant comes into the head from the top radiator hose. TIA all, Luther On Thu, 19 Jun 2008 20:44:57 -0500, Peter

Re: [MBZ] '86 SDL no a/c

The two - wire side is normally open on the '87 300D. On Sun, Jun 22, 2008 at 7:41 PM, Luther [EMAIL PROTECTED] wrote: Can someone (with an OM603) pull the connectors off their green coolant sensor and check if they are normally open? This is the sensor that sits next to the fuel filter

Re: [MBZ] '86 SDL no a/c

and the single-wire side is??? That is the side that helps the ACC. Thanks, Luther On Sun, 22 Jun 2008 19:50:08 -0500, OK Don [EMAIL PROTECTED] wrote: The two - wire side is normally open on the '87 300D. On Sun, Jun 22, 2008 at 7:41 PM, Luther [EMAIL PROTECTED] wrote: Can someone (with an

Re: [MBZ] '86 SDL no a/c

Also open -- On Sun, Jun 22, 2008 at 7:53 PM, Luther [EMAIL PROTECTED] wrote: and the single-wire side is??? That is the side that helps the ACC. -- OK Don, KD5NRO Norman, OK There are three kinds of lies: lies, damn lies, and statistics. -Benjamin Disraeli and/or Mark Twain '90 300D

Re: [MBZ] '86 SDL no a/c

Crap, which I read this earlier, Iwould have done it. Back in for the evening now. And no, I didnt even mess with that engine swap like I told you I was planning on. Luther wrote: Can someone (with an OM603) pull the connectors off their green coolant sensor and check if they are normally

Re: [MBZ] '86 SDL no a/c

Lazy bum. You should just pay me to do it... Luther On Sun, 22 Jun 2008 20:09:44 -0500, Kaleb C. Striplin [EMAIL PROTECTED] wrote: Crap, which I read this earlier, Iwould have done it. Back in for the evening now. And no, I didnt even mess with that engine swap like I told you I was

Re: [MBZ] '86 SDL no a/c

On my 87 300D, the temperature sensor is a thermistor (two wires) and the single one is a switch to turn on the cooling fan, Don't know what part is used on the SDL, as the pushbutton unit is different. I'll check my brother's later, but it may be an 87, and the values changed on the W124

Re: [MBZ] '86 SDL no a/c

yea, I should have you come over for a week and whip thru many projects Luther wrote: Lazy bum. You should just pay me to do it... Luther On Sun, 22 Jun 2008 20:09:44 -0500, Kaleb C. Striplin [EMAIL PROTECTED] wrote: Crap, which I read this earlier, Iwould have done it. Back in for

Re: [MBZ] '86 SDL no a/c

I had to swap this sensor when I did the head swap. The '91 350SDL that this head came from had 4 cntacts, IIRC. After reading through the 1986 Supplement, it seems to me that the green coolant sensor in question should be normally open. The official test is: Start engine, pull 1-pole

Re: [MBZ] '86 SDL no a/c

Might want to try letting the engine heat up and rechecking. Could be normally open that closes when it comes up to temp. Or vice-versa. -Dave Walton On Thu, Jun 19, 2008 at 12:09 AM, Luther [EMAIL PROTECTED] wrote: That sensor plug is keyed and cannot be reversed? I've applied some Deoxit

Re: [MBZ] '86 SDL no a/c

No, the Klima was NOT told to turn the a/c on. Pin 10 at the Klima mount read open on the Ohm meter. I pulled the ACC and it's WA different from the I think that SDL has the refrigerant safety switch in that line. Often it's the last thing on the way to the compressor, but I think in

Re: [MBZ] '86 SDL no a/c

Pin 10 at the Klima mount read open on the Ohm meter. I pulled the ACC With both out you can ohm out the wire between them. Klima pin 10 to ACC X1 pin 7. If it's not zero ohms, then the refrigerant sensor (which I think is in there) is at fault. Or disconnected. Or, doing what it's supposed

Re: [MBZ] '86 SDL no a/c

With both out you can ohm out the wire between them. Klima pin 10 to ACC X1 pin 7. If it's not zero ohms, then the refrigerant sensor (which I think is in there) is at fault. Or disconnected. Or, doing what it's supposed to! I just checked the schematic. The pressure switch _is_ in

Re: [MBZ] '86 SDL no a/c

I just checked the schematic. The pressure switch _is_ in between the ACC and the Klima pin 10. In commemoration of somebody actually using the checklist, I added a socket picture of the Klima. (I pulled the Klima from the car, and got out the schematic again.) -- Jim

Re: [MBZ] '86 SDL no a/c

It's toast, I think. On the 300D, one wire is the fan switch, should be open, but the other two (two wire plug, if the plug is still intact) is a thermistor. May be a switch and a thermistor on the W126, I'm not sure. Could be a coolant temp switch, too for that matter, you will have to

Re: [MBZ] '86 SDL no a/c

Low pressure switch was already bypassed by the po. So I pulled the KLIMA relay and the instant I hit pins 5 7 together, I heard the clutch kick in. I'm going to resolder the KILMA now. How can I tell if the low pressure switch is good? The system has full charge from Monday morning (I

Re: [MBZ] '86 SDL no a/c

Of Luther Sent: Wednesday, June 18, 2008 10:56 AM To: Mercedes Discussion List Subject: Re: [MBZ] '86 SDL no a/c Low pressure switch was already bypassed by the po. So I pulled the KLIMA relay and the instant I hit pins 5 7 together, I heard the clutch kick in. I'm going to resolder the KILMA now

Re: [MBZ] '86 SDL no a/c

Low pressure switch was already bypassed by the po. So I pulled the KLIMA relay and the instant I hit pins 5 7 together, I heard the clutch kick in. I'm going to resolder the KILMA now. Yes, but this isn't definitive. Was Klima told to turn on the AC? How can I tell if the low pressure

Re: [MBZ] '86 SDL no a/c

Hrm, maybe if I quit my night job :D Luther On Wed, 18 Jun 2008 10:04:08 -0500, Bill R [EMAIL PROTECTED] wrote: When you are practiced up would you be interested in doing another? Mine is back to working correctly after a month of problems, but if it lasts the summer I think I had better

Re: [MBZ] '86 SDL no a/c

I don't mind. Guess that is not the #1 consideration at the moment though. BillR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Luther Sent: Wednesday, June 18, 2008 11:24 AM To: Mercedes Discussion List Subject: Re: [MBZ] '86 SDL no a/c Hrm, maybe

Re: [MBZ] '86 SDL no a/c

at the moment though. BillR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Luther Sent: Wednesday, June 18, 2008 11:24 AM To: Mercedes Discussion List Subject: Re: [MBZ] '86 SDL no a/c Hrm, maybe if I quit my night job :D Luther On Wed, 18 Jun 2008 10

Re: [MBZ] '86 SDL no a/c

] [mailto:[EMAIL PROTECTED] On Behalf Of Luther Sent: Wednesday, June 18, 2008 12:00 PM To: Mercedes Discussion List Subject: Re: [MBZ] '86 SDL no a/c I don't mind, I'm hoping to not be employed there within the next 6 months. I'm working on getting my home repair business to the self-sustaining

Re: [MBZ] '86 SDL no a/c

Only way I know to tell if the pressure switch is working is to measure its continuity while measuring the pressure. It's standard procedure to check it after adding refrigerant. All the ones I've seen are closed (zero ohms) with pressure in the system. If one of the wires falls of its better to

Re: [MBZ] '86 SDL no a/c

No, the Klima was NOT told to turn the a/c on. Pin 10 at the Klima mount read open on the Ohm meter. I pulled the ACC and it's WA different from the 123s that I'm familiar with. How do you get these buggers appart and what are the normal failure modes? I can see several caps on the

Re: [MBZ] '86 SDL no a/c

Hold that thought, I just read your section on checking if everything that tells the ACC what to do is working ok...be back in a while after these tests are done. Luther, On Wed, 18 Jun 2008 12:38:39 -0500, Luther [EMAIL PROTECTED] wrote: No, the Klima was NOT told to turn the a/c on. Pin

Re: [MBZ] '86 SDL no a/c

OK, test results are all normal except for the following: Sensor Ground test, Pin 8 (coolant temp)=open Vacuum flaps, pin 8 (short DEF Flap)=1k ohms Maybe I have a bad (hopefully unplugged) coolant sensor. What does the vacuum flap reading mean? Luther On Wed, 18 Jun 2008 12:41:29 -0500, Luther

Re: [MBZ] '86 SDL no a/c

Luther wrote: I'm working on getting my home repair business to the self-sustaining point. If you are ever in Wichita, Kansas and want to make a little extra money, I need somebody really good to install a dishwasher in my house. My house was built in 1929 and never has had a dishwasher. So,

Re: [MBZ] '86 SDL no a/c

I believe that the coolant sensor for the ACC is in a dual element sensor on the engine - one set of pins for the ACC, the other for the idle control. The AC on my SDL would turn off the compressor as soon as the coolant hit 80C - the PO had reversed the sets of wires on that sensor. The AC

Re: [MBZ] '86 SDL no a/c

] [mailto:[EMAIL PROTECTED] On Behalf Of Luther Sent: Wednesday, June 18, 2008 11:24 AM To: Mercedes Discussion List Subject: Re: [MBZ] '86 SDL no a/c Hrm, maybe if I quit my night job :D Luther On Wed, 18 Jun 2008 10:04:08 -0500, Bill R [EMAIL PROTECTED] wrote: When you are practiced up would

Re: [MBZ] '86 SDL no a/c

. Striplin Sent: Wednesday, June 18, 2008 6:32 PM To: Mercedes Discussion List Subject: Re: [MBZ] '86 SDL no a/c Im assuming you have health insurance etc with your real job. My advice, dont give that up. I have been self employed for many years, having that insurance is very nice, along with the 401k

Re: [MBZ] '86 SDL no a/c

The pusbutton unit provides the ground for the signal -- it must have 12V on it with the ignition on. If not, you have a wiring problem, usually a broken wire at the socket. That's why I suggested testing voltage to ground at the pressure cut- out switch. To jump a few posts, check the

Re: [MBZ] '86 SDL no a/c

I have connections for reasonably priced self-employment insurance. I'm figuring in retirement/insurance/taxes all into the picture. I'm not going to quit the night job until I can easily make double in the home repair business. Luther On Wed, 18 Jun 2008 18:06:28 -0500, Bill R [EMAIL

Re: [MBZ] '86 SDL no a/c

- From: Donald Snook [EMAIL PROTECTED] To: mercedes@okiebenz.com Sent: Wednesday, June 18, 2008 2:22 PM Subject: Re: [MBZ] '86 SDL no a/c Luther wrote: I'm working on getting my home repair business to the self-sustaining point. If you are ever in Wichita, Kansas and want to make a little extra

Re: [MBZ] '86 SDL no a/c

/08 9:42 PM Subject: Re: [MBZ] '86 SDL no a/c I have connections for reasonably priced self-employment insurance. I'm figuring in retirement/insurance/taxes all into the picture. I'm not going to quit the night job until I can easily make double in the home repair business. Luther On Wed, 18

Re: [MBZ] '86 SDL no a/c

Wilton wrote: Donald, if I were there, I'd do it for ya free and with pleasure - ya wouldn't be able to tell it had been added later. Installed several of 'em in old houses 35 to 40 years ago. 'Have also built several kitchens and houses from scratch. 20 years ago, 'also restored 2 large

Re: [MBZ] '86 SDL no a/c

That sensor plug is keyed and cannot be reversed? I've applied some Deoxit to all of the coolant sensor connectors. I've checked the resistances of all of the coolant sensors, and the 3 pronged green (see the picture link) showed open to ground, and open across all 3 combinations of prongs.

[MBZ] '86 SDL no a/c

ugh... power is off at the house so I am sending this from my phone. The SDL now has a fresh charge of R134 and the compessor will not kick in. What are the diagnosis steps that I need to do from here? TIA all, Luther, from my Blackjack II -- Luther KB5QHUAlma, Ark '87 300SDL

Re: [MBZ] '86 SDL no a/c

I pulled this off the web a while back. It might be for a different model, but the pinouts for the Klima should be the same. I have not gone through it all, but jumped around when working on my 87SDL. FYI - step 49 gives me ~ 9K ohms on both my SDL's. If you have measurements you want me to check

Re: [MBZ] '86 SDL no a/c

Here is a picture of the bad solder connections on my overvoltage relay: http://www.meternumber.com/Mercedes_OvervoltageRelay_BadSolder.JPG -Dave Walton ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used

Re: [MBZ] '86 SDL no a/c

If it's made by Bosch, it's pretty typical for the vintage. This is the same issue that plagues the ACC pushbutton unit - the solder fails over time and cracks, making for an intermittent connection. A good quality soldering iron, a little time, and after reflowing the joints all should

Re: [MBZ] '86 SDL no a/c

Here is a picture of the bad solder connections on my overvoltage relay: http://www.meternumber.com/Mercedes_OvervoltageRelay_BadSolder.JPG Classic problem, easy to fix. (Once you get to where you can take a picture!) -- Jim ___ http://www.okiebenz.com

Re: [MBZ] '86 SDL no a/c

I pulled this off the web a while back. There is also some checklist information in my web page, mostly about diagnosing Klima and ACC panels: http://userweb.windwireless.net/~jimc/mamerepairs.html With these and the car's schematic you can go far! -- Jim

Re: [MBZ] '86 SDL no a/c

Where are the klima and overvoltage relays? I might as well just pull them and the push button unit and resolder them all now. Thanks, Luther On Mon, 16 Jun 2008 10:03:56 -0500, dave walton [EMAIL PROTECTED] wrote: Here is a picture of the bad solder connections on my overvoltage relay:

Re: [MBZ] '86 SDL no a/c

They are next to each other under the hood mounted on the firewall next to the brake master cylinder and booster - opposite side than the fuse box. The square one is the overvoltage relay, the long rectangular one is the Klima. Quick checks - Resistance on the AC Pressure switch should be zero.

Re: [MBZ] '86 SDL no a/c

First, check for voltage at the low pressure switch on the reciever/ dryer. This is the one with spade lugs and push-on connectors. If you have voltage (12V or more) to ground, the pushbutton unit is not switching the compressor on. Jumper them together with the engine running and the