Rear tail lights go off when high beam is switched on (1 Viewer)

[ceylonfj40nut]

Not sure how to diagnose this. Have a 1973 FJ40 with the single round red rear tail lights. In low beam all lights work-head lights, front and rear quarter lights, rear lights, font and rear turn signals. When I switch to high beam using the turn signal switch on the steering column, the rear running tail lights go off. All other lights work. Hazards work well in both scenarios. Any advice would be appreciated.

 

[Jdc1]

Not sure how to diagnose this. Have a 1973 FJ40 with the single round red rear tail lights. In low beam all lights work-head lights, front and rear quarter lights, rear lights, font and rear turn signals. When I switch to high beam using the turn signal switch on the steering column, the rear running tail lights go off. All other lights work. Hazards work well in both scenarios. Any advice would be appreciated.

Without being at the truck, check your grounds, twice.

I’ve had luck with a small jumper to make sure.

 

[JMZ400]

^^^ What he said. Check grounds

 

[YODA 88 62]

Turn signal/Flasher issue

Hey there, New to the forum. I recently picked up a ‘72 40 but the wiring from the PO is a monstrosity. I’m having troubles with my turn signal and flashers. When the turn signal (left and right) is switched on with the lights switch off, I get the audible clicking noise but the turn signal...

forum.ih8mud.com

See mine and others posts in this thread…it’s almost always related to dirty connections.

 

[ceylonfj40nut]

I have known and offered the same advice. Let me dive into this some more.