Ok I am not sure why my upper 3rd brake light quite working, any of you know where to look, I thought it had bulbs, but it is an LED, is there a relay for that, my othe brake lights and back up work fine
97 fj80 3rd brake light
- Thread starter shocktower
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- brake brake light fj80 light
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2 likely culprits.
1) Diode replacement (easy and cheap) The 36th Lock: DIY Landcruiser Third Brake Light Fix: $0.69
2) Wires that run between the top of the hatch may be damaged
1) Diode replacement (easy and cheap) The 36th Lock: DIY Landcruiser Third Brake Light Fix: $0.69
2) Wires that run between the top of the hatch may be damaged
- Thread starter
- #3
Thank you, I tested it and I have a bad diode, I went to Toyota stealership, and good guy's price is is $420 USD, so I will be trying to fix it. Thank you very much
I had this same issue on my '94. I got it fixed earlier this year. I cannot remember what the exact issue was, or how my mechanic fixed it. I do recall him saying that one possible fix would be to re-route power from the rear brake lights up to the third. Your issue could be with the wires, or it could be the actual brakelight. Dismantle the brake light and plug it into an alternate power source. If it turns on/works, then it's not your issue. If it doesn't work, then something could be wrong with the brakelight. You can find brakelights in wrecking yards that have wrecked 80's. When I had this issue I went to a local wrecking yard that had an 80. They tested my brakelight and found that it worked – so I didn't need to buy theirs. I think the place offered to sell it to me for $50? So you can probably find one on the cheap.
This probably isn't of much help, sorry!
This probably isn't of much help, sorry!
Resurrecting this thread. Yes indeed it is the zener diode. That link above is invaluable. Thanks for posting it.
Hook the power supply up to the positive/negative (white with black stripe) input side, no lights. Apply the positive power supply lead the the back side of the zener diode and they light. I'm seeing prices for as low as 15 cents for these diodes. Need to find an electronics component supply locally to buy one. Otherwise it is a week wait for components to be shipped in.
Hook the power supply up to the positive/negative (white with black stripe) input side, no lights. Apply the positive power supply lead the the back side of the zener diode and they light. I'm seeing prices for as low as 15 cents for these diodes. Need to find an electronics component supply locally to buy one. Otherwise it is a week wait for components to be shipped in.
what is the correct value/PN for the Zener Diode?
The third brake light was out on my 1997 cruiser, so after finding the arrival I ordered a pack of zener diode($7 from Amazon) and went the checking. I found three wires were broken at the lift gate where the wiring harness comes from the headliner area to the hatch. I stripped the wires, crimped them back together, heat shrink and electrical taped them, and I’m back in business.
I’m my diagnosis, after taking the third brake light assembly apart and checking that the diode was fine, I checked to see there was power at the plug behind the left (driver side) brake/tail assembly (yep 12v) and then checked it at the third brake light plug (nada).
Now I have to check my 1994 cruiser to see if the third brake light works on that one too.
I’m my diagnosis, after taking the third brake light assembly apart and checking that the diode was fine, I checked to see there was power at the plug behind the left (driver side) brake/tail assembly (yep 12v) and then checked it at the third brake light plug (nada).
Now I have to check my 1994 cruiser to see if the third brake light works on that one too.