turn signals |
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turn signals |
injunmort |
Jul 27 2013, 10:13 AM
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#1
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Senior Member Group: Members Posts: 1,024 Joined: 12-April 10 From: sugarloaf ny Member No.: 11,604 Region Association: North East States |
greetings all, i have an issue with my 1971 914. the turn signals function normally with the headlights off, but don't function at all with the headlights on. any thoughts on where to start would be greatly appreciated. all the bulbs are good and all the wiring seems fairly stock. thank you
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Spoke |
Jul 27 2013, 10:43 AM
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#2
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Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Do the 4-way flashers work with the ignition key off and the headlights on?
Here's the pertinent wiring schematic for the turn signals. The headlights don't come into play here. You might have a ground problem somewhere. Attached image(s) |
injunmort |
Jul 27 2013, 11:14 AM
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#3
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Senior Member Group: Members Posts: 1,024 Joined: 12-April 10 From: sugarloaf ny Member No.: 11,604 Region Association: North East States |
with headlights off, ignition off, 4 way flashers function normally. with headloghts on, ignition switch off, left rear and right front flashers function but not there counterparts?
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Spoke |
Jul 27 2013, 11:18 AM
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#4
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Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Is it with headlights on or just the parking lights on?
Check all the bulbs to make sure they are making good contact in the sockets. The bulbs should be the 1157 type as well with the dual filaments. |
Spoke |
Jul 27 2013, 11:20 AM
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#5
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Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Also when the lights are flashing, make sure its the bright filament flashing and not both. If both are flashing then the bulb isn't making good contact with its ground lead.
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injunmort |
Jul 27 2013, 11:21 AM
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#6
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Senior Member Group: Members Posts: 1,024 Joined: 12-April 10 From: sugarloaf ny Member No.: 11,604 Region Association: North East States |
loss of signal functionality occurs when the headlight switch is in any position qther than off.
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injunmort |
Jul 27 2013, 11:30 AM
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#7
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Senior Member Group: Members Posts: 1,024 Joined: 12-April 10 From: sugarloaf ny Member No.: 11,604 Region Association: North East States |
bight filament when the lights are for flashing, headlights on both filaments on left ide light only dim eilment on right light.
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Spoke |
Jul 27 2013, 01:42 PM
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#8
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Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Sounds like you have some socket issues with the ground.
Are the sockets nice and clean? Clean the sockets; make sure the bulb base is clean. With everything off and the bulb out, measure resistance of the socket to ground. Not the terminals at the bottom; the base metal of the socket. These should be at ground potential so you should measure just about zero ohms. |
injunmort |
Jul 27 2013, 09:46 PM
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#9
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Senior Member Group: Members Posts: 1,024 Joined: 12-April 10 From: sugarloaf ny Member No.: 11,604 Region Association: North East States |
will try to do tomorrow thanks for the assistance
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Dave_Darling |
Jul 28 2013, 09:59 AM
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#10
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
Verify the wire connections with both front and rear turn signal buckets. Since the light is dim in the error condition, it is probably getting power feeding back through some other bulb, which means someone has the wrong connections.
--DD |
Cap'n Krusty |
Jul 28 2013, 10:20 AM
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#11
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Verify the wire connections with both front and rear turn signal buckets. Since the light is dim in the error condition, it is probably getting power feeding back through some other bulb, which means someone has the wrong connections. --DD ....... or the wrong bulb. A double filament bulb in a single filament socket, or vice versa, will cause that problem. The Cap'n |
Mike Bellis |
Jul 28 2013, 10:40 AM
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#12
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
Sounds like a ground problem to me. If a ground is open the circuit fill find ground through the lamp filament while the lights are off. When the lights turn on, the circuit turns positive and will no longer flow current backwards through the circuit.
A DC circuit only needs a less positive path for current flow. This is why wacky things happen with bad grounds. Check them all! |
euro911 |
Jul 28 2013, 11:39 AM
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#13
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California |
Analyzing the circuit schematic, I'll put my $ on the wrong bulbs too (IMG:style_emoticons/default/idea.gif)
(IMG:style_emoticons/default/popcorn[1].gif) |
injunmort |
Jul 28 2013, 02:15 PM
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#14
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Senior Member Group: Members Posts: 1,024 Joined: 12-April 10 From: sugarloaf ny Member No.: 11,604 Region Association: North East States |
I have not looked at rear lights yet but front turn signal bulbs are double filament. is this not correct?
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Cap'n Krusty |
Jul 28 2013, 03:28 PM
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#15
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Yes.
The Cap'n |
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