C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

interior light timer

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Old Jan 3, 2014 | 01:07 PM
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Default interior light timer

'88 auto. My interior lights would not shut off after closing the door and removing the key. I pulled the fuse but that also controls the heater, hence no heat. I replaced the fuse and took out the interior light control timer, which solved the problem, just had no interior lights. However, the next day my battery was dead. Apparently the circuit stays open allowing the battery to drain. Is there a way to wire the timer plug to close the circuit or possibly get into the timer itself and rewire. Having trouble finding a replacement timer, so maybe there is a way to fix this problem until I do find one. Thanks !
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Old Jan 3, 2014 | 01:20 PM
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I would start out checking the door and hatch switches.

The door switches (most common) may not be working correctly and may need an adjustment.
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Old Jan 3, 2014 | 01:24 PM
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A few days ago one of the guys on here said he wired the interior lights to go off when the door was closed without having a timer, so it can be done..Hopefully he will chime in and let you know how this was done..WW

PS...I just went on ebay and found 3 used and 1 new interior light timers....Just type in (88 Corvette interior light timer) to get the listing....WW

Last edited by WW7; Jan 3, 2014 at 01:29 PM.
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Old Jan 3, 2014 | 01:45 PM
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Originally Posted by WW7
A few days ago one of the guys on here said he wired the interior lights to go off when the door was closed without having a timer, so it can be done..Hopefully he will chime in and let you know how this was done..WW

PS...I just went on ebay and found 3 used and 1 new interior light timers....Just type in (88 Corvette interior light timer) to get the listing....WW
Duh ! Ebay, I've been to all the used corvette places with no luck. Thanks..........
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Old Jan 3, 2014 | 01:46 PM
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Originally Posted by pcolt94
I would start out checking the door and hatch switches.

The door switches (most common) may not be working correctly and may need an adjustment.
Did that. They work, but thanks.
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Old Jan 3, 2014 | 03:23 PM
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If the timer is done and your not worried about the timer, splice all 3 white wires together and lights will work only when door is open.
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Old Jan 4, 2014 | 01:07 AM
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Willcox makes replacement timers, both with and without the delay.

http://willcoxcorvette.com/advanced_...keywords=timer
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Old Jan 4, 2014 | 11:18 AM
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Originally Posted by AGENT 86
If the timer is done and your not worried about the timer, splice all 3 white wires together and lights will work only when door is open.
Thanks Agent 86.........you've helped me many a times.
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Old Mar 9, 2014 | 12:41 PM
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I have a lights always on problem in my 90 C4. Where is the timer relay located?
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Old Mar 9, 2014 | 05:15 PM
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Default interior light timer

Originally Posted by AGENT 86
If the timer is done and your not worried about the timer, splice all 3 white wires together and lights will work only when door is open.
Thanks, I will check when I find the timer.
DOES ANYONE KNOW WHERE THE TIMER IS IN A 1990 C4?
Thanks Jim
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Old Mar 9, 2014 | 05:35 PM
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Originally Posted by jimfvandyke
WHERE THE TIMER IS IN A 1990 C4?
How about for an '85?
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Old Mar 9, 2014 | 07:01 PM
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84-89 Timer.
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Old Mar 12, 2014 | 09:17 AM
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A similar problem. I have been chasing this one on my '95 convertible. Been through all the threads and changed door switches for both new and used replacements without luck, so I hope the delay timer may be involved. The radio is sometimes locked off. Interior lights come on when the doors open, security light functions normally. The radio will sometimes not come on and the clock is frozen. If a longer drive, the clock will change and the radio works. Other times the radio is fine, yet others it never comes on no matter how long the drive. Could this be a symptom of a bad timer? Could I test it by splicing wires to bypass it.? Thanks!
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Old Mar 12, 2014 | 10:57 AM
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Originally Posted by Cliff Harris
Willcox makes replacement timers, both with and without the delay.

http://willcoxcorvette.com/advanced_...keywords=timer
And replacement boards for the timers for half the price. Why hack it when you can fix it.
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Old Mar 12, 2014 | 07:32 PM
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Originally Posted by milsurpman
And replacement boards for the timers for half the price. Why hack it when you can fix it.
Agreed, and I will happily buy a new board if that is the problem. I just need to know if the symptoms I am describing point to a bad board. Thanks!
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Old Mar 12, 2014 | 07:53 PM
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Originally Posted by AGENT 86
If the timer is done and your not worried about the timer, splice all 3 white wires together and lights will work only when door is open.
Will the interior lights still work if you have the door shut and turn them on?
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Old Mar 12, 2014 | 09:05 PM
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Originally Posted by samsonb
Will the interior lights still work if you have the door shut and turn them on?
Yes
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Old Mar 12, 2014 | 09:29 PM
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As a reminder to all... the boards are not a fix all for an existing issue too. The coupes seem to have an issue with the rear hatch rectifier going bad. When this happens the energy from the hatch release can zap the board. The best evidence of this is an old board that has melted the plastic housing.

Willcox
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Old Mar 12, 2014 | 10:35 PM
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Originally Posted by AGENT 86
Yes
Do you leave the board connected up and connect the 3 white wires together? Or do you disconnect the board, and then connect the 3 white wires?
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Old Mar 13, 2014 | 09:34 AM
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if you are doing a hard wire, you remove the old board.
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