Electrical gremlin

[Hambone]

Having problems with blinkers on the Titan, decided to swap out the turn signal control unit, after swapping, my headlights would not work, no power to #17 or #18, only light coming on in service light position now is the left turn signal #461(without the blinker being turned on). Swapped back to the original turn signal unit and still no headlights, decided to swap out headlight switch, put in a NOS, still the same problem, I have tried several turn signal units, still same problem. How am I getting power to the left front turn signal(in serv. light position) even with the turn signal unit unplugged? as I stated, this all happened after swapping turn signal unit.

[Fil Bonica]

Hi /lo. Switch ?
What does harness look like ?
Any damage to wires at connector?
Do you have a third lite switch for test?

Fil Bonica

[elmer]

I had a similar problem for quite some time and finally discovered that the problem was in a cable that was almost broken between all the wires that pass through the hole between the engine compartment and the dashboard.
elmer

[Hambone]

Fil,
it has a NOS harness, think I bought it from you , all connections good, haven't checked dimmer switch but what is puzzling it's getting power to #461(left turn signal) with turn signal unit unplugged, I have another light switch I can try.

[Hambone]

Hi /lo. Switch ?
What does harness look like ?
Any damage to wires at connector?
Do you have a third lite switch for test?

Fil Bonica

After 3 different light switches, finally got power to #16 at dimmer switch, still no lights, pulled the wires from dimmer switch, jumped #16 to #17 and #18 and bingo, Headlights, so bad dimmer, funny I lost both switches at the same time, one of the light switches was NOS, sure wish I could fix them, hate to throw them away , as for the front turn signal lighting up, I had #491 plugged into #461, need to upgrade my readers . Blinkers still don't work, I think it is in the rear harness, I had to splice some new ends on it, good chance 461 and 491 are wired wrong as a couple of wire marker were missing, tail lights and brake lights are working, got to get the meter out. Think I'm going to take my frustrations out on a 6 pak.

[Fil Bonica]

No charge for the remote diagnosis!
Been there Done that !

Good luck

Fil Bonica

[rickf]

Have you checked the ground on the flasher control unit on the floor?

[Surveyor]

sure wish I could fix them, hate to throw them away

Well you could always mail them to me or check out this site...

Rebuilding an m-series 3-lever master light switch
http://pages.suddenlink.net/randygar/switch/switch.html

[Hambone]

No charge for the remote diagnosis!
Been there Done that !

Good luck

Fil Bonica

Thanks for the help Fil

Have you checked the ground on the flasher control unit on the floor?

going to swap out tomorrow

sure wish I could fix them, hate to throw them away

Well you could always mail them to me or check out this site...

Rebuilding an m-series 3-lever master light switch

I will send you one no charge if you want to tear it apart.





I will send you one no charge if you want to tear into it.
http://pages.suddenlink.net/randygar/switch/switch.html

[Hambone]

Rick'
Doesn't the flasher box ground through pin C which goes to #57 ground circuit?

[rickf]

It could but some also have a separate ground wire and some ground through the case. Grounding through the 57 circuit is a long path to ground and could entail a lot of resistance. Are you working with an A1 or A2 wiring harness?

[Hambone]

It could but some also have a separate ground wire and some ground through the case. Grounding through the 57 circuit is a long path to ground and could entail a lot of resistance. Are you working with an A1 or A2 wiring harness?

Nos A2 harness, I will make sure the case has a good ground.

[SturmTyger380]

I was helping a friend install turn signals on his M37. He ordered all the items from a prominent MV vendor. We got it all wired up correctly and nothing would work. Turns out the flasher unit was bad. Every time we plugged it in it would ground out causing the circuit breaker in the light switch to pop. You could hear it pop.

While he returned the flasher unit for a good one we wired a modern flasher unit in. Worked like a charm.

[Hambone]

After going through 3 light switches, the forth one was good, replaced the dimmer switch also, all is good now, thanks for the info.