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99 Yukon Starter Relay Constant On - Draws Down Battery

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Old Jun 7, 2011 | 01:30 PM
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Default 99 Yukon Starter Relay Constant On - Draws Down Battery

My battery draws down in about 2-3 days parked. Isolated problem with VOM meter and pulling one fuse at a time in engine bay fuse box. The IGN A fuse (40a) is the culprit circuit. I then pulled the Starter Relay and noticed it was hot. When I plug it in it goes on. I checked ignition switch wiggling it to make sure it wasn't still in on position. No wiggle there. I doubt it could be the ignition switch, but you never know. I put VOM meter on Starter Relay coil terminals in fuse box and the circuit is constant on regardless of ignition switch position. Car runs fine. Now I have to pull the IGN A fuse everytime I park to keep battery from draining.

I'm trying to find electric schematic of that circuit to no avail.

Anyone have suggestions?
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Old Jun 7, 2011 | 01:36 PM
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Replace the relay. I had one a while back that drained the battery, traced it to the power antenna relay. The relay tested as good, but it still drained the battery. Replaced relay, and problem was gone.
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Old Jun 7, 2011 | 01:46 PM
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Forgot to mention, swapped relay with AC relay, same relay # 3604. Beside, with relay unplugged from box and VOM meter in the two slots that power the relay'* coil, the meter shows constant power to the relay coil. So, something is not shutting off that circuit when ignition turned off.

Thanks for the quick reply though.
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Old Jun 7, 2011 | 02:00 PM
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Start tracing wires back. Something is shorted or stuck.
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