Need help with power hatch
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Joined: Oct 2003
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From: Baxter MN
Need help with power hatch
The door switches for the rear hatch on my '91 coupe do not work. The center (console) switch works fine. Before I tear the doors apart, are there any simple, obvious things I should be checking first? All comments are appreciated.
Glen
Glen
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All hatch release buttons work by completing the ground circuit to power the hatch release relay.
However, the two door switches rely on the Courtesy Light Delay Timer (CLDT) to complete the ground path.
If neither door button is working, ground the Wht wire to the CLDT and hit the button (The CLDT is located behind the RH side of the I/P, near multi-use center. The CLDT has going to it the following wires: Wht, Orn, Pnk/Blk, Blk, and two Yel wires). If the hatch opens, find out why the CLDT isn't completing the ground connection.
If only one door button doesn't work ground the Brn wire at the button. If the hatch opens, close it, ground the Wht wire at the button and hit the button. If the hatch doesn't open replace the button.
However, the two door switches rely on the Courtesy Light Delay Timer (CLDT) to complete the ground path.
If neither door button is working, ground the Wht wire to the CLDT and hit the button (The CLDT is located behind the RH side of the I/P, near multi-use center. The CLDT has going to it the following wires: Wht, Orn, Pnk/Blk, Blk, and two Yel wires). If the hatch opens, find out why the CLDT isn't completing the ground connection.
If only one door button doesn't work ground the Brn wire at the button. If the hatch opens, close it, ground the Wht wire at the button and hit the button. If the hatch doesn't open replace the button.
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Just to be sure, is the engine running or ignition in the on position? If so, the door switches for the hatch will not operate. That's in my '93, in my '95 the console switch doesn't work when the engine is running, but the door switch does.
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Joined: Oct 2003
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From: Baxter MN
Thank you for the suggestions. I wasn't sure what wires to ground to check this circuit. So far all I've done is pull the switch out and check to see if I can complete the circuit by bypassing the switch - no luck. Using a multimeter in the "volts" setting just tells me I either have no power or no ground up to the door switch. I haven't pulled the door apart to trace the wires to the fault. For what its worth, this is the situation with the key "off" as well as "on." My suspicion is that it's a ground problem as 'vettes seem to have more than their fair share of this issue. Probably due to the nature of being built of non=conductive material.
Thanks again.
Glen
Thanks again.
Glen
