Rear Right Turn Signal

[benjy_26]

Hello all. 

 

My MJ recently developed a condition in which the passanger side rear turn sign does not flash when I have the brake pedal pressed down.

 

I've cleaned the light harness connector near the airbox but the problem persists. 

 

Does anyone know where the tail lights ground to the body? Is it the same location as the fuel pump ground?

 

Thanks a bunch! 

[jdog]

Does it flash if your not on the brakes, do the brake lights and running lights work? Stupid question what bulbs are in it

[benjy_26]

3 hours ago, jdog said:

Does it flash if your not on the brakes, do the brake lights and running lights work? Stupid question what bulbs are in it

Brake and running lights work and the turn signals both work if I don't press down the brake pedal. When I press the brake pedal, the right turn signal does not flash. 

 

I have 1107's (I think) in it. New-ish sylvania bulbs. 

[fiatslug87]

Compiled by HOrnbrod

[cruiser54]

You likely have a bad socket. 

[benjy_26]

1 hour ago, cruiser54 said:

You likely have a bad socket. 

Is there a way to test them?

[Ωhm]

I'm not sure about this but its easy enough to try:
KEY OFF.
Depress brake pedal.
Using T/S SW set to RH side, can you turn OFF the RH rear bulbs?
Try same thing for the LH side.

[benjy_26]

37 minutes ago, Ωhm said:

I'm not sure about this but its easy enough to try:
KEY OFF.
Depress brake pedel.
Using T/S SW set to RH side, can you turn OFF the RH rear bulb?
Try same thing for the LH side.

Ok, so, key off, brake pedal depressed:

All 4 lights come on. 

 

Turn signal to the right:

All 4 lights come on. 

 

Turn signal to the left:

Only right hand side lights come on. 

 

Brakes not pressed (key on):

Turn signal right: right hand side flashes

 

Turn signal to the left:

 

Left side flashing

 

 

 

 

[Ωhm]

26 minutes ago, benjy_26 said:

Ok, so, key off, brake pedal depressed:

All 4 lights come on. 

 

Turn signal to the right:

All 4 lights come on. 

 

Turn signal to the left:

Only right hand side lights come on.

The STOP/TURN circuit is a strange circuit. It has two (2) B+ feeds. 1.Brake SW B+ feed. 2.T/S flasher B+ feed. Each B+ feed is determined by the position of the T/S SW. You either have a faulty T/S SW or the Brake SW B+ feed is shorted to the RH side STOP/TURN circuit. I'll keep looking to see if there's anyway to prove out one or the other.

[benjy_26]

24 minutes ago, Ωhm said:

The STOP/TURN circuit is a strange circuit. It has two (2) B+ feeds. 1.Brake SW B+ feed. 2.T/S flasher B+ feed. Each B+ feed is determined by the position of the T/S SW. You either have a faulty T/S SW or the Brake SW B+ feed is shorted to the RH side STOP/TURN circuit. I'll keep looking to see if there's anyway to prove out one or the other.

Holy smokes! Thanks a TON man! I really appreciate it! 

[Ωhm]

Disconnect C156.

KEY OFF.
DO NOT depress brake pedel.
On the IP Harness side measure for continuity between C156_N and C156_P. If NO continuity exist suspect T/S SW, wires or connector on the steering column. If continuity does exist wires are shorted within the IP Harness.

[benjy_26]

Nice. I'll get on it.

 

Now..what does IP stand for? 

[cruiser54]

Instrument Panel

[benjy_26]

Thanks! 

[benjy_26]

5 hours ago, Ωhm said:

Disconnect C156.

KEY OFF.
DO NOT depress brake pedel.
On the IP Harness side measure for continuity between C156_N and C156_P. If NO continuity exist suspect T/S SW, wires or connector on the steering column. If continuity does exist wires are shorted within the IP Harness.

Ok, so, with the key off (column locked, actually) I have no continuity between N and P on the IP side. I'll be replacing the multifunction switch either today or tomorrow.