Turm signal issue

[oakley1919]

Im hoping someone can help me with a turn signal issue on here.

1986 M1008.

When the parking lights get turned on the light for the turn signals left and right also turn on. Hazards work fine on their own and flash alil fast. Neither turn signal works on their own. Ground is good bulb is nice and bright.

It's like the parking lights are back feeding into the turn signals with how bright the lights are but they aren't flashing and the turn signals won't operate.

BTW both turn signals worked last week.

Items replaced:
Turn signal switch under the steering wheel.
Front turn signal bulbs.
Front left and right turn signal pigtails replaced due to broken ground in the socket.
Light bulbs in dash.

So at this point I'm kind of lost as to where to go next.

Any help is appreciated. Thank you all.

 

[deank]

Please check and or replace the side marker bulbs and the rear stop/tail/turn bulbs. They all act as turn signals. The indicators on the dash stay on when there is a bad bulb in the circuit.

 

[deank]

There are grounds at the front on both sides of the radiator support that will rust and cause issues too.

 

[oakley1919]

Please check and or replace the side marker bulbs and the rear stop/tail/turn bulbs. They all act as turn signals. The indicators on the dash stay on when there is a bad bulb in the circuit.

While I haven't replaced the rear bulbs they do seem to be functioning properly. The side marker lights are also working.

 

[oakley1919]

There are grounds at the front on both sides of the radiator support that will rust and cause issues too.

Thank you I will look into that. I did find one ground wire just hanging out disconnected on the driver's side with all the wires while looking into this issue. I have since reattached it.

 

[deank]

In post #4 you say that the rear bulbs appear to function properly. Does that mean that they flash correctly as turn signals?

The front and rear turn signals are on separate circuits in the turn signal switch.

 

[deank]

This is a good tool to track your turn signal issues

Also look at the color wiring diagrams

CUCV Wiring Diagram color (except M1010)

CUCV Wiring Diagrams color (except M1010) I've been working on these, hope they'll help someone. If there needs to be any correction just let me know. I corrected two with warthog's help... Corrected Charging Circuits 09/29/2011

www.steelsoldiers.com

 

[oakley1919]

In post #4 you say that the rear bulbs appear to function properly. Does that mean that they flash correctly as turn signals?

The front and rear turn signals are on separate circuits in the turn signal switch.

The rear brake lights, light up but not flashing. Sorry I guess I worded that very poorly. Thank you for asking for clarification on that.

 

[oakley1919]

This is a good tool to track your turn signal issues
View attachment 951572
Also look at the color wiring diagrams

CUCV Wiring Diagram color (except M1010)

CUCV Wiring Diagrams color (except M1010) I've been working on these, hope they'll help someone. If there needs to be any correction just let me know. I corrected two with warthog's help... Corrected Charging Circuits 09/29/2011

www.steelsoldiers.com

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This is a good tool to track your turn signal issues
View attachment 951572
Also look at the color wiring diagrams

CUCV Wiring Diagram color (except M1010)

CUCV Wiring Diagrams color (except M1010) I've been working on these, hope they'll help someone. If there needs to be any correction just let me know. I corrected two with warthog's help... Corrected Charging Circuits 09/29/2011

www.steelsoldiers.com

Thank you for all this. i have printed it all for this and future use.