Honda Prelude Brake Lights Fail When Headlights On

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MELBLONDY
  • MEMBER
  • 1 POST
[b:63e66e4611][color=red:63e66e4611][/color:63e66e4611]MY PRELUDES BRAKE LIGHTS DON'T WORK WHEN HEADLIGHTS ARE ON....WHEN PARKING LIGHTS ARE ON, THE BRAKE LIGHTS WORK?????PLEASE HELP[/b:63e66e4611]
Jun 24, 2006 at 6:57 PM
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CODY-ODY
  • ✓Experienced Mechanic
  • 57 POSTS
sounds like you have a bad ground.. this means you will have to start looking at the wiring for corroded or loose connections(usually the black wire) Start from theb back of the vehicle and work you're way forward,open the connectors along the way and check the terminals to make sure there not green or burnt. I can't remember exactly but I think on certain years they had a small black box mounted in the back near the tail lights that had a small printed circuit in them to control the current and ground(where I am these things corroded fastand were the cause of many problems.
Another thing you might try is get a manual or wiring diagram for the car so you can see where the grounds are located and it'll be easier to chech them that way
Hope I could be of some help to you and goodluck!
Jun 26, 2006 at 11:42 AM

Suggested Repair

Inspect the rear lighting grounds and wiring, especially black ground wires, for loose, corroded, or burnt terminals. Start at the tail lights and work forward, opening connectors along the way. Also check the small black circuit box near the tail lights if equipped, and use a wiring diagram to locate the grounds.

Conversation Summary

The owner of a Honda Prelude reported that the brake lights do not work when the headlights are on, but they do work with the parking lights on. The expert said this sounds like a bad ground and recommended checking rear wiring and connectors for corrosion or loose terminals, inspecting a possible tail-light circuit box, and using a wiring diagram to locate the grounds.

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