I just finished replacing the turn signal switch on my '68. Headlights, parking lights, brake lights, and emergency flashers are all working, but my turn signals are not working. I spent the extra money for a NOS switch, so I wouldn't think the switch should be bad, but I guess anything is possible. Turn signals were working before I replaced the switch. Any ideas?
Seems to me that if the only thing you switched was the switch, and suddenly everything's not working, that's what I'd suspect. I'd swap out the old switch and see what happens.
__________________ "Natalie", '66 Coupe
Freshly Rebuilt 4-Speed w/ Hurst Performance Plus
289, Holley Carb, Edelbrock Intake and Water Pump, Tefba, Summit Direct Fit Rad
3.55 with Posi, Zoom Clutch
Next On the Agenda:
Interior - Replace floorpans (in progress), new carpet, tilt column, new steering wheel
Exterior/Body/Performance: Windshield (in progress), New cowl (in progress), weatherstripping, power steering
Here's some additional info to help with troubleshooting. The part number of the switch I installed is C8ZZ-13341-A. The part number of a lot of the other switches I have seen listed is C8SZ-13341-A. Any concerns here? I thought "Z" was for Mustang and "S" was for Thunderbird. The service numbers on the tags for my old and new switch are the same.
Question #1... with the ign switch OFF and your foot on the brake, does flipping the switch turn OFF the brake light on that side?
If the answer is YES, that means the switch is doing it's job of interrupting the brake light signal so it can flash the t/s.
Question #2 - With the ign switch ON, does flipping the switch turn on the corresponding indicator lamp on the dash?
If the answer is "YES", then you definitely have something going on with the switch as the indicator lamps are piggybacked on to the front lamp circuit. You probably don't have any contact between the switch and the rear contacts. It could be as simple as moving the column a bit closer to the wheel.
If the answer is "NO", then I would do a basic circuit check to make sure that one of the two terminals of the t/s flasher plug has voltage with the key "ON". If not, check the t/s fuse - you could have inadvertently blown it while installing the switch if you had the key "ON".
I still have the brand new repro turn signal switch and harness connector that I bought for this repair before I decided to go NOS instead. Maybe the easiest way to troubleshoot this is just attach the new repro switch to the harness connector and plug it in. This should be a valid test for any other issues even without installing the switch in the column, correct?
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