Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

Flashing SES

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Old Apr 9, 2009 | 04:21 PM
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omegan's Avatar
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Joined: Apr 2009
Posts: 7
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From: Sweden
Car: Trans Am GTA -91
Engine: 350 Tpi
Flashing SES

Trans am 350 Tpi -91

I have a very strange problem.
When I turn on the ignition my ses lamp begins to flash every 2-3 seconds. At the same time my primary cooling fan goes on and off.
The air select and air divert thing clicks like its gone mad. When this happens i cant start the engine.
I have checked and sprayed every sensor and relay connections I can find and they all look ok. The only code I can pull from the ecm is 12.
If I leave the ignition on for a few minutes everything goes back to normal and I can start the engine.The car runs perfectly with no ses lamp untill the next time I start it.

//Omegan
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