Brake Light Issue

[1stgear]

Here's a strange one. I got home last night and when I hit the brakes my right front signal lights up (like a brake light) but my rear right doesn't. Driver's side is functioning properly. Any ideas?!?!

 

[infidel got me]

Check bulbs for bad filament?

 

[dilvoy]

Check your grounds.

 

[NDT]

Turn signal handle.

 

[Awol]

Check your grounds.

That's where I would start. Bad grounds cause some really weird things to happen.

 

[1stgear]

Turn signal handle.

I recently replaced the turn signal handle. Hadn't thought of that! Think that could be it?

 

[NDT]

I recently replaced the turn signal handle. Hadn't thought of that! Think that could be it?

Yes, but check the cheaper to fix issues mentioned above first.

 

[1stgear]

Yes, but check the cheaper to fix issues mentioned above first.

I still have the old unit. I'll throw it on and see if that fixes the issue! That's just as easy as checking the other areas. I'm actually hoping it's a bulb or a ground though. I don't feel like having to send that thing back for a refund. lol

 

[1stgear]

Went home for lunch and tried putting in the old turn signal handle to see if that fixed the issue. No dice. BUT, there was a small difference. When I hit the brakes, the front passenger side didn't come on.

Here's a link to the auction of the turn signal handle I purchased. I have a 1992 M998 Humvee. Is this the correct handle? - http://www.ebay.com/itm/201649606184

 

[dilvoy]

The Humvee is one of the M Series Vehicles that share turn signal systems, head lamp assys, tail light assys, front marker assys, light switch assy and probably some other things.

 

[1stgear]

Okay, did some digging this afternoon. It's a combo issue. The bulb is blown and the turn signal switch must be bad. When you hit the brakes the both rear turn signals come on as well as the front right passenger light. When I put the old turn signal unit on, everything worked fine except for the blown bulb. Must be something wrong with the new unit I received.

 

[infidel got me]

Stuuuupid question-- you did try it with a new bulb right?

 

[1stgear]

Stuuuupid question-- you did try it with a new bulb right?

I couldn't get a new bulb at the parts store. Had to order one. But I did put the good bulb from the left side in the right side. When I had the new turn signal switch installed the front right AND back right bulbs lit up. When I put the old turn signal switch back on, only the back right lit up. I'm thinking that the switch must have been sending power to both units when I hit the brakes and the back bulb burnt out. In hindsight, I noticed the issue after I installed the new switch - never before.

 

[orgnal]

Turn signal handle.

I second a check and replacement of the turn signal unit at the steering column. I had the same problem on my HMMWV.

McReddy

 

[Action]

Do you have a push button light switch?

 

[1stgear]

Do you have a push button light switch?

I don't. I have the three toggle switches.

 

[1stgear]

It was the turn signal handle.

 

[orgnal]

It was the turn signal handle.

Thank you for the update

McReddy

 

[1stgear]

Thank you for the update

Yes, sir. And I have the auto-cancelling ring version now that makes life so much easier!