The fuses are actually fairly cheap at the dealer, or were at the
Houston dealer a couple of years ago (after I explained to the guy what
they were).
--R
Dillon, Meade M CIV SPAWARSYSCEN-ATLANTIC, 53310 wrote:
Rich, our cars must have been plotting. This a.m. my wagon refused to
start; no glow timer light. She'd been idling very rough during cold
idle for the first 30 seconds or so over the last month, and so I was
suspicious of the glow plugs. I'd tested resistance a couple weeks ago
but all seemed OK. Tested again this a.m., all plugs tested fine and
fuse looked good. Still no glow light, no start. Extended cranking of
the engine wouldn't even get one cylinder to light off. Put the battery
on the charger and took a closer look at the fuse, and sure enough it
had a hair-line crack.
Check my spare fuses - 30 Amp only - darn!
Used a piece of 14 gauge wire to jumper the fuse screws, and she started
right up. Will be attempting to purchase two fuses locally after work
today...
I'm still trying to figure out the rough cold idle; I may have to rig
the in-line ammeter and test the plugs that way.
-Max
-----Original Message-----
From: mercedes-boun...@okiebenz.com
[mailto:mercedes-boun...@okiebenz.com] On Behalf Of Rich Thomas
Sent: Sunday, January 31, 2010 3:00 PM
To: Mercedes Discussion List
Subject: [MBZ] One bad glow plug spoils the whole bunch?
The SD has been reluctant to start recently (in the "cold" weather we
have here) so I just checked on it. Looks like the rearmost glowplug
(#5?) is bad, I get open (OL) reading on the ohmmeter while the others
are in the 0.6ohm range. The glow plug fuse and relay are OK, getting
12V across the fuse and at the relay pins until the relay clicks off.
None of the glow plugs seem to be warming up though (according to my
calibrated finger). Can that one bad glow plug cause the others not to
heat up?
I don't have a amp clamp, but if there is 12V at the plug wires at the
relay it should be getting juice to all of them?
I'll go out to make sure there is 12V at each plug connector to make
sure the connector didn't go bad or something.
That last plug looks like a bugger to get out too.
--R
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