Andrew, I've been told you can also use an IN4007 but I've always used the IN4004 with results as expected so far. I've wired a hypo amp this way and an earthquake in another 1600 and it's still running great (buggers a 1600 boot seals badly if you run it closed with that baby and doesn't do the battery much good either.) You only need to use the diode in the 12v feed from the relay from Pin 87 or 12v power source past the pickup point if you opt not to wire in a relay.
It is important when you use a diode to power a head unit, amp etc to never ever wire in another accessory past the diode, i.e. one wire with diode for one accessory, more than one accessory then use a separate feed and another diode on the output from Pin 87. Things can and often will go bang if you don't follow this rule as one unit can back feed off the other - draw a diagram to illustrate the circuits if you don't understand why this happens. Also, there is no point wiring the diode on the feed to Pin 30 as it allows back feed up the sense wire (Pin 86) if the relay ever chatters (usually happens when you kill the sense source like when you turn the Ign to Off) and this can power whatever the sense wire source is - i.e. Acc Heater etc and that's what you are protecting your head unit from with the relay & diode. Hope this makes sense for you, you've gotta love the behaviour of the electrons in the 1600 method of wiring. regards Terry -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Andrew Greenbury Sent: Monday, 14 October 2002 12:17 PM To: [EMAIL PROTECTED] Subject: RE: wiring confirmation Gday Terry, Interesting points thanks. So is, for instance, say a 1N4004 diode suitable, and should it be put inline with the acc feed to the headunit, or the +12V feed, or both? Thanks Andrew > Andrew, > > Additionally to what you've said the Accessories feed (heater fan, radio > etc) is Blue, and there is another Acc circuit for the wipers but this is a > much smaller wire and shouldn't be used for a head unit. I've found that you > can only draw up to around 100w through the primary Acc circuit with a > Radio/CD/Cassette etc although the circuit is rated at 20 amps. What I do > for the CD player/Amp etc is use a direct to battery feed via a mini Bosch > relay and use the Acc circuit to switch the relay. Another thing to watch > with wiring in a modern day CD that has a logic circuit in a 1600 is to fit > an inline diode to the power feed. A logic circuit controls features like > allowing power to the unit without the Ign on for a controlled time etc, but > with older cars the logic circuit will try and power other things on the > circuit, like the heater fan in a 1600 and that will destruct the circuit in > the unit unless the flow of power is controlled. A few brands actually have > a diode in the power feed but I've come across some that don't eg Phillips. > The Phillips units have an activation option which shouldn't be used unless > the diode is fitted. Some alarm systems are a bit funny with older cars for > the same reason. > > regards > Terry > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Andrew > Greenbury > Sent: Tuesday, 8 October 2002 12:05 PM > To: [EMAIL PROTECTED] > Subject: wiring confirmation > > > hello all, > > the 1600 wiring diagram is a pretty confusing thing - just wanted to > confirm what wires behind the instrument cluster are recommended for > splicing into when wiring in say a headunit or alarm; white/red for const > 12V, and blue/black for 12V with ignition? > > Thanks everyone > Andrew > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
