Turn signals not working bad ground?
#1
Purchased my 73 Mach 1 in June.  The turn signals worked but now they don't.  I have replaced the flasher and the turn signal switch.  All fuses look good.  I do not hear any clicking in the flasher unit when the turn signals are used.  All lights are working including the hazard flashers. Any thoughts?  Appreciate any assistance. 

I was reading another forum on here and he fixed the problem by cleaning up the ground wires. He didn't state which ones or the locations sadly. I've already cleaned the bulb's grounds front and back and those aren't the problem because the lights still light up with the hazards. I'm pretty sure the ground is located somewhere in the dash that fixed the problem with the other guy's turn signals. Can anyone point me in the right direction?

Link to the other guy's forum: https://mach1club.com/showthread.php?tid...g#pid41288

Thanks,
Justin
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#2
The grounds are all over the place. Anywhere you see a black wire attached to a stud or body/sheetmetal directly, that's a ground. If memory servers me right the first one 1. at the battery and solenoid area, should be a 3/8 headed screw straight into the inner fender panel, and goes straight to the negative battery post. 2. There is one at the back of the engine usually a braided cable to the firewall it's self. 3. I believe there is one at the bottom of the steering column which attaches to firewall. 4. there a couple grounds at the rear tail lights along the bottom edge of the taillight panel itself. 5. there is a ground stud up behind the heater box if I remember correctly. I know there are more but those are the ones that come to mind. Hope it helps.

JTS


PS I posted this in both threads so you won't miss it. Good Luck
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#3
(03-03-2022, 08:17 AM)JTS71 Mach1 Wrote: The grounds are all over the place. Anywhere you see a black wire attached to a stud or body/sheetmetal directly, that's a ground. If memory servers me right the first one 1. at the battery and solenoid area, should be a 3/8 headed screw straight into the inner fender panel, and goes straight to the negative battery post. 2. There is one at the back of the engine usually a braided cable to the firewall it's self. 3. I believe there is one at the bottom of the steering column which attaches to firewall. 4. there a couple grounds at the rear tail lights along the bottom edge of the taillight panel itself. 5. there is a ground stud up behind the heater box if I remember correctly. I know there are more but those are the ones that come to mind. Hope it helps.

JTS


PS I posted this in both threads so you won't miss it. Good Luck

Sounds good, I'll update you after I locate and clean the ground wires up! Thank you for all your help.
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