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I've never driven my newly acquired '88 TC (less than 4k original miles) at night, but I noticed that the instrument cluster lights do not work with the dimmer/interior light dial. Also, the interior lights come on at two different intervals while rotating the dial. I've replaced the 5 amp fuse but that didn't help. Any ideas would be welcome. Thanks.
Rich S.
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Jeff K
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Joined:
Apr 2001
Milwaukee, WI
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Not uncommon for the rheostat that controls the dash lights brightness to get dirty, corroded, etc. Pull the light switch and check the rheostat "coil" (the resistance wire) and the sliding contact for damage, corrosion, etc. Spray electrical contact cleaner on the coil and sliding contact and rotate the dimmer wheel thru its range several times. Repeat this process a few times. Plug the light switch back into the harness and see if the dash lights work.
Jeff Korn
88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
11 Crown Vic Interceptor
14 Toyota Camry (wifes car)
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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(11-12-2021, 04:26 PM)Jeff K Wrote: Not uncommon for the rheostat that controls the dash lights brightness to get dirty, corroded, etc. Pull the light switch and check the rheostat "coil" (the resistance wire) and the sliding contact for damage, corrosion, etc. Spray electrical contact cleaner on the coil and sliding contact and rotate the dimmer wheel thru its range several times. Repeat this process a few times. Plug the light switch back into the harness and see if the dash lights work.
Thanks Jeff. Will do!
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