Electrical Diagnosis, Lights, Brake Light and Flashers Options

[Highland]

2 issues:

1) When I brake the front turn signal goes on along with the brake lights.

2) The flashing parking brake indicator also causes both left and right turn signal indicators to flash.

From what I can tell from the electrical schematic both tie into the emergency light switch.

Just wondering if I could get some advice before I pull the emergency switch to inspect for defects.

Flashing relay is new.

[rjames]

I'm little help here, but here's a link to a thread with wiring diagrams:

http://914world.com/bbs2/index.php?showtopic=331099

The flasher unit works for both the turn signals and the e-brake.
You said you just replaced it. Did the flashers ever work correctly? I seem to recall that there were some aftermarket units that didn't work correctly.

[Spoke]

2 issues:

1) When I brake the front turn signal goes on along with the brake lights.

2) The flashing parking brake indicator also causes both left and right turn signal indicators to flash.

From what I can tell from the electrical schematic both tie into the emergency light switch.

Just wondering if I could get some advice before I pull the emergency switch to inspect for defects.

Flashing relay is new.

@Highland

Which front turnsignal lights up? One side or both? If on one side, that means the brake bulb has lost its ground. If the brake bulb loses ground, both filaments will light up and the return path is through the running light in the front turnsignal.

About the flashing relay, is it a new unit? What p/n?

[Highland]

2 issues:

1) When I brake the front turn signal goes on along with the brake lights.

2) The flashing parking brake indicator also causes both left and right turn signal indicators to flash.

From what I can tell from the electrical schematic both tie into the emergency light switch.

Just wondering if I could get some advice before I pull the emergency switch to inspect for defects.

Flashing relay is new.

@Highland

Which front turnsignal lights up? One side or both? If on one side, that means the brake bulb has lost its ground. If the brake bulb loses ground, both filaments will light up and the return path is through the running light in the front turnsignal.

About the flashing relay, is it a new unit? What p/n?

Only the right front turn signal lights up with the brake lights.

Part number is 91461830312 from Wehrle. New from Pelican.

The brown wire from the taillight shows continuity to the chassis.

[Spoke]

The brown wire from the taillight shows continuity to the chassis.

You need to measure the ground at the bulb base. Remove the rear lens on the right side and have someone step on the brake. See if both filaments are lit. If so, then the bulb does not have a ground.

In the front, remove the lens and see if the dim filament is lit. Likely the turnsignal filament in the front is not lit.

[Highland]

The brown wire from the taillight shows continuity to the chassis.

You need to measure the ground at the bulb base. Remove the rear lens on the right side and have someone step on the brake. See if both filaments are lit. If so, then the bulb does not have a ground.

In the front, remove the lens and see if the dim filament is lit. Likely the turnsignal filament in the front is not lit.

I'm a bit confused with the logic, but did as directed and the socket is continuous with the chassis.

When pressing on the brake only one rear bulb (center) goes on along with the dimmer front right turn signal.

The turn signal light flash normally (outer large bulb) and the outermost small bulb turns on when the signal indicator is activated with ignition off (as I believe it should).

Anything other suggestions? before I tear into the emergency switch?

[Spoke]

The brake/running light dual filament bulbs in the rear are the only place the brake and running light come together.

If the bulb is not grounded, hitting the brake will set a path from the brake filament through the running light filament and terminates in the front turnsignal dual filament bulb.

With brake on, check if both filaments in the brake bulb are lit.

[Highland]

The brake/running light dual filament bulbs in the rear are the only place the brake and running light come together.

If the bulb is not grounded, hitting the brake will set a path from the brake filament through the running light filament and terminates in the front turnsignal dual filament bulb.

With brake on, check if both filaments in the brake bulb are lit.

Thanks for the clarification. Seems like the filaments are activating when they should. One on with parking lights, 2 on with brake and pedal depressed.

But discovered that with ignition off (key out) and right parking light on, when I press the brake pedal the ignition goes on (pump and gages activate).

This only happens with the right parking light, not when left only is activated.

Also when I turn on the left parking light only the left side turns on. When I turn on the right parking light, the right side and rear left turn on.

Maybe a short in the turn indicator switch? Where should I start looking?

[Spoke]

But discovered that with ignition off (key out) and right parking light on, when I press the brake pedal the ignition goes on (pump and gages activate).

This only happens with the right parking light, not when left only is activated.

It still seems like the right brake light ground is not there.

Here's my thoughts:

Ig off, RT turnsignal on (right running lights should light; they are), brake depressed: Ig ON.

OK if there is no ground on the right brake light, with ig off and RT turnsignal on, power is to the running light filament. w/o ground, the running light filament (connected to the brake filament in the bulb) powers the brake filament which is connected to the 914 electrical system through the depressed brake pedal and (sort of) powers the system.

Check this by pulling the right brake bulb and retesting.

It may be prudent to clean the socket. It can be done with a small screwdriver. Just scrape the socket walls and the buttons being careful not to put much pressure on the buttons.

[Highland]

Thanks @Spoke .

Always something simple and a careless mistake on my part.

Right brake light bulb was single filament. Replaced the bulb with dual filament and all issues resolved.

[Cairo94507]

Thanks for circling back with the resolution; we all learn that way. (IMG:style_emoticons/default/beerchug.gif)