NO TURN SIGNALS???'S

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dickeymoore

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Atlanta
First Name
Clarence
Truck Year
1984
Truck Model
C 10
Engine Size
5.7
I have a 1984 C 10 that the turn signals will not work no light up on dashor nothing the turn signal flasher is good i think changed with 2 different ones and the fuse in the fuse box is good any HELP?THANKS
 

shinkle

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Barry
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1987
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R10
Engine Size
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Do you have working headlights and running lights?
 

Matt69olds

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Matt
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81
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GMC 1/2 ton
Engine Size
455 Olds
Do the reverse lights work? Do the brake lights work? The turn signal and reverse lights are on the same fuse, if the reverse lights work then the fuse isn’t the problem.

Does the 4way emergency flashers? Try pushing/pulling the 4way flasher a few times, sometimes the contacts in the turn signal switch get gummed up.

Check for power on the purple wire at the turn signal switch connector with the ignition on. If you have power at the purple wire, chances are the turn signal switch is bad.
 

dickeymoore

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Clarence
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1984
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C 10
Engine Size
5.7
Headlights,running lights and brake lights work
 

Matt69olds

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Did you try playing with the hazard switch? Did you check power on the purple wire (with the ignition on) at the turn signal switch? If the hazard switch does nothing, and you have taillights and brakes lights, and power on the purple wire, then most likely the turn signal switch itself is bad.

If you have reverse light, and no power on the purple wire, check/replace the flasher.
 

squarelyfe

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Larry
Truck Year
1975
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k25
Engine Size
350
Probe for power at the signal sockets with the bulbs out, key on with signal on to L+R. Check grounds and bulbs themselves.
 

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