Turn Signal Problems... Please Help!
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Senior User
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From: Willamette Valley
Turn Signal Problems... Please Help!
I have a 1974 Ford Pickup and my turn signals all stopped working. I checked the fuse and it is fine. No display inside and they are not working on the outside. What would cause this? I did do some work behind the instrumental panel... could I of messed something up or unplugged something accidentally. Please help since this is my daily driver I need to get it fixed quickly.
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From: Stanton,Ne
Check your blinker stat under the dash. There are two of them. One is for your turn signals, the other is for your emergency flashers. If your flashers work stick your head under the dash and listen for the blinker stat clicking. It's a kinda metallic tink sound. Once you know it works unplug it from the harness and plug it into the regular blinker harness. If your blinkers work just replace the one one you took out. The blinker wiring runs down through the column I doubt working under the dash would mess it up.
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From: Willamette Valley
Turn Signals Still Won't Work!
I got under the dash and switched the hazard stat with the blinker stat and it still didn't work. Both stats worked fine in the hazard light hookup. What else could cause this problem? Thanks.
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From: Stanton,Ne
The dash wiring goes into a printed circuit at one location at back of the instrument cluster I believe so if it wasn't plugged in right nothing would work. If you had the column apart it's possible something let go there. Usually it's the plastic piece that sits under the wheel. Check your brake lights to see if they work you might have accidently unpluged the sending unit on the petal while under the dash. Check also for a loose or disconnected ground wire too. It might help if I knew what kind of work you did under the dash also if you don't mind. Keep in touch.
Cargo Master
Joined: Apr 2001
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From: Eustis FL
Might be the hazard switch in the column. All circuits for lights run through it. If there are cheap parts at your local junkyard (or they have a good return policy), grab a switch from another truck similar in year to yours. You need to remove the wheel, but the harness disconnects near your feet with a semi-circle shaped connector. Later (1978-up) trucks had a column shroud that contained the wiring to the switch which made it easy to pull the wiring and connector right up through. The earlier trucks without the shroud are a little more troublesome. For the purpose of this test, try to find a later setup. Unplug your harness, and while leaving it in place, plug in the new harness to the connector and try your signals and brake lights. If it works, install your new switch. If not, try to get your money back on the purchase (or sell on ebay once you fix your problem and test the new switch for operation)
Mark
Mark
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From: Garfield Hts, Ohio
Double check the fuse connections
I just went through this on my 76. Turn signals stop working, but all running, brake and four ways still worked. Turned out the contacts in the fuse panels where corrored, cleaned them up with a wire brush and they work great now.
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From: Willamette Valley
Thanks for all the help! I have tried several things and they still don't work. I don't think it has anything to do with the fuse because my reverse lights work and that is on the same fuse if I am not mistaken. My plan is to trace the wires out of the steering column until I find the problem. Anyone know how many wires and what color they probably would be? Thanks.
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From: Easton,Ks
Originally Posted by rutang
Thanks for all the help! I have tried several things and they still don't work. I don't think it has anything to do with the fuse because my reverse lights work and that is on the same fuse if I am not mistaken. My plan is to trace the wires out of the steering column until I find the problem. Anyone know how many wires and what color they probably would be? Thanks.
The color of the left rear turn/brake wire 1968= #283 Red-White Stripe, 1977=#283 Yellow-Black Stripe
The right rear turn/brake wire 1968= #282 Green, 1977=#282 Green
The front left turn bulb wire 1968= #3 Green-White Stripe, 1977= #3 Green White Stripe
The front right turn wire 1968=#2 White Blue Stripe, 1977= #2 White Blue Stripe
In 1977 & 1968 the above bulbs will have a brown wire shown alongside the other color going to the rear lamps. In 1968 the Rear was # 285 was brown and the front was #11 Black Yellow Stripe. The brown and black yellow stripe wires are the running lights, so just ignore those wires.
The inputs to the column would be:
Color of the power wire coming from the brake switch. 1968= #810 Red-Black Stripe, 1977=#810 Red Black Stripe
Color of the power wire coming from the turn signal flasher. 1968= #44 Blue, 1977=#44 Blue
Color of the power wire coming from the hazard Switch. 1968= #810A Red-Black Stripe, 1977=#385 White Red Stripe
Note 1968 #810 & 810A merge at plug "S" going to Turn Signal Switch.
Note 1968 Emergency Warning Switch will feed front wires #2 & #3.
Postmaster
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The main feed wire feeding the turn signal is a red wire with a black stripe. On the turn signal harness on the steering column, verify for positive "+" voltage on the red wire with a black stripe.
A quick test, Run a positive feed (separate wire) from the turn signal fuse or from another positive source, to the red wire with black stripe on the steering column and check to see if the turn signal will function properly.
The problems seems to be from the fuse panel to the turn signals switch.
A quick test, Run a positive feed (separate wire) from the turn signal fuse or from another positive source, to the red wire with black stripe on the steering column and check to see if the turn signal will function properly.
The problems seems to be from the fuse panel to the turn signals switch.
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