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Strange electrical issue

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Old Apr 13, 2011 | 11:27 PM
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Strange electrical issue

I'm having a weird problem with my starter.

Basically when the trigger wire is on the starter motor I have constant ACC as in my warning lights and heaters etc are on without the key even being in!?

When I pull it off the car will work as it should except obviously it wont start (However I am getting 12v+ at the trigger wire when its not on).

So whats going on? Stuck relay or something?
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Old Apr 14, 2011 | 12:49 AM
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Now when its on ACC the car is trying to start...? Wish my car would diaf.

Its a 87 turbo btw
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Old Apr 14, 2011 | 03:24 AM
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Is it possible that something here (circled in pic) may have been fried and is causing it to start on ign?
Attached Thumbnails Strange electrical issue-diagram.jpg  
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Old Apr 14, 2011 | 06:13 AM
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If the wire is off the starter........................................doe s the key in OFF act like a normal car or not? Key in OFF and out of the ignition, does that result in no warning lights, heater etc?

IF thats the case with the key out of the igniton and nothing looking abnormal, what would happen if you then put the wire back on the starter?

Done any alternator wiring lately? Done any wiring changes recently? Messed with the elect plugs for the ignition switch?

What work did you do just prior to you having this problem?

This car have factory THEFT protection or any aftermarket theft protection?

The wire on the starter is spliced to wires that go to the heater cut relay in the heater assy and also spliced to pin 3B on the ECU (as a input TO the ECU, not a ECU output). Neither of those should be able to backfeed power to the starter.

The car trying to start in ACC almost sounds like a internal problem with the ignition switch. You might go to the ignition switches elect plugs and pull the Black/Red connector apart and see if the problem still exists. The black/red that is in a plug all by itself should be the starter wire. There's another black/red but its in a two wire connector and should not be pulled apart.

I'd try this last thing just above first. If you find my wire colors don't match your car......say so. I'm doing this partly from memory.
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Old Apr 14, 2011 | 06:21 AM
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Or simply get your meter out. Pull the Black/Red wire apart at the ignition connectors (the black/red in a connector all by itself.

Then put the key to ON or even ACC. Then put your meter on the black/red coming FROM the ignition switch and see if there is batt power there. Should not be there if the switch is good. Might also go to START and see if power is there. Should be there in Start but obviously not on the black/red when in any other position.

Again, talking about the black/red coming FROM the switch in a connector all by itself as distinguished from a black/red in a connector with another wire.

Yeah, that's what I'd do first.
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Old Apr 14, 2011 | 06:28 AM
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Attached are two jpg I posted recently of what the wires AT the igniton switch do in life.

As you know, several of those wires change colors at their mating plugs a foot from the switch.

The White/Red power wire changes to a pure black wire at the connectors.

The Black/Red stays the same color at the connectors.

The Black/Yellow changes to a Black/White wire at the connectors.

The Blue ACC wire stays the same color at the connectors.

The Black/White changes to a black/red at the connectors and is in a plug with another wire at that connector.

I'm pretty sure I got that right. If wrong someone say so and I'll change it.
Attached Thumbnails Strange electrical issue-power.jpg   Strange electrical issue-powertwo.jpg  
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Old Apr 14, 2011 | 08:07 PM
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Originally Posted by HAILERS2
If the wire is off the starter........................................doe s the key in OFF act like a normal car or not? Key in OFF and out of the ignition, does that result in no warning lights, heater etc?
Ok, well my starter was not working on a bench test so I replaced it. With the original starter ^^ that would happen (and the problem that was was in the OP).

Originally Posted by HAILERS2
IF thats the case with the key out of the igniton and nothing looking abnormal, what would happen if you then put the wire back on the starter?
The second I put the wire back on without the key, I would get warning lights, heaters etc

Originally Posted by HAILERS2
Done any alternator wiring lately? Done any wiring changes recently? Messed with the elect plugs for the ignition switch?

What work did you do just prior to you having this problem?
I have removed my alt plug and re-taped it (it was peeling off etc and connected it back up, but thats about it. Only wiring change I have done is snipped a couple of unneeded emissions plugs on the top of the block. I made sure the ends were not in contact with anything. Only time I have looked at the ignition is when I was doing some testing there that you recommended from the last thread, but that was just unplugging and re plugging which I have checked again.

Prior to this problem, I replaced that wire (as per my last thread) that gave me power into the cabin. Everything worked fine but it would crank, I check voltage, grounding etc and then when I bench tested the starter it failed. Went to a wrecker and scored another one. When I put that on, I was getting the cranking when IGN issue. On closer inspection I have noticed that the wire from the starter to the solenoid is on the opposite terminal to the original one. Now with the old starter, I get the problem of having constant warning lights and heater when the trigger wire is attached and with the new one it works fine BUT cranks in IGN....



Originally Posted by HAILERS2
This car have factory THEFT protection or any aftermarket theft protection?
I still cant find the anti theft plug that should be by my trailing coils. When I first got it it had been stored for 5 years and the alarm had to be removed/bypassed (words from my friend) but I think it was an aftermarket one then. Drove it around fine for a while then got a 5-star AVS alarm installed, thats been fine the whole time and seems to be working normally at the moment.

Originally Posted by HAILERS2
The car trying to start in ACC almost sounds like a internal problem with the ignition switch. You might go to the ignition switches elect plugs and pull the Black/Red connector apart and see if the problem still exists. The black/red that is in a plug all by itself should be the starter wire. There's another black/red but its in a two wire connector and should not be pulled apart.
Ok so if its trying to start then its getting power from somewhere random, if not its likely the switch?

Originally Posted by HAILERS2
I'd try this last thing just above first. If you find my wire colors don't match your car......say so. I'm doing this partly from memory.
You were right last time so Ill have a look, pretty sure its black/red
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Old Apr 14, 2011 | 08:11 PM
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Originally Posted by HAILERS2
Or simply get your meter out. Pull the Black/Red wire apart at the ignition connectors (the black/red in a connector all by itself.

Then put the key to ON or even ACC. Then put your meter on the black/red coming FROM the ignition switch and see if there is batt power there. Should not be there if the switch is good. Might also go to START and see if power is there. Should be there in Start but obviously not on the black/red when in any other position.

Again, talking about the black/red coming FROM the switch in a connector all by itself as distinguished from a black/red in a connector with another wire.

Yeah, that's what I'd do first.

Cool, Ill finish my coffee and give that a crack!



Thanks HAILERS2 really appreciate your patience and help, wish I wasn't so newb >_<

Last edited by BurritoBut; Apr 14, 2011 at 08:14 PM.
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