Wierd turn signal buzzing |
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Wierd turn signal buzzing |
flat4 |
Apr 20 2008, 03:21 AM
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#1
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Member Group: Members Posts: 120 Joined: 13-December 07 From: Australia Member No.: 8,459 |
Hi All, the turn signals on my rebuild seemed to work OK for a while. Now they are not. They work fine with either signal on, or the hazard flashers. When off there is a buzzing from the relay and the brake & turn indicator warning lights are always on, but a bit dimmer than normal.
I disconnected the column stalk and the problem is still there. So I went back to the last thing I fixed, which was to put bulbs in the various indicator lights and put them back in the correct holes in the gauges. Lo and behold the problem only occurs with the brake warning bulb in. For now I've taken it out so I can fix the rest of the issues on the car, but I'd like to get to the bottom of it and have the warning light back before driving on the road. Why does the brake warning light come on with the turn signals (flashing in time with the turn indicator)? I assume it is meant to, or is this a problem? Any ideas? Thanks, Steve |
SGB |
Apr 20 2008, 08:21 AM
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#2
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just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
hmmm...
The dim glow from the turn signal indicators is supposed to be a result of the "wrong" flasher relay, but I don't think the "right" relay is made anymore. Apparently all the references cite a later flasher. My brake light doesn't participate in the wierd/ dim flasher behavior. I'm really puzzled that changing the flasher indicator bulbs changed anything. It didn't resolve the same problem in my car. |
flat4 |
Apr 21 2008, 05:07 AM
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#3
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Member Group: Members Posts: 120 Joined: 13-December 07 From: Australia Member No.: 8,459 |
My flasher relay is from Pelican and has a 914 part number, so I'm hoping it is the correct one... Part number 914-618-303-11-M44
I bought it as the wiring didn't match the generic one I bought. Guess I'll keep following wires to see if something has a bad earth. Cheers, Steve |
914Sixer |
Apr 21 2008, 08:09 AM
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#4
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914 Guru Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
What year is your car? 73 had a resistor pluged inline for the brake light. It must be there to work properly. I will get a picture later and post it. I am disassembling a 73 now.
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flat4 |
Apr 21 2008, 08:52 AM
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#5
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Member Group: Members Posts: 120 Joined: 13-December 07 From: Australia Member No.: 8,459 |
What year is your car? 73 had a resistor pluged inline for the brake light. It must be there to work properly. I will get a picture later and post it. I am disassembling a 73 now. Mine is a 74 1.8 Due to the right hand drive conversion there has been some pretty dodgy wiring, so I'm ready to believe anything at the moment. Cheers, Steve |
914Sixer |
Apr 21 2008, 11:12 AM
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#6
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914 Guru Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
Here is the picture of the resistor required on the brake light. It may be needed on your car also. There is also a special seat belt buzzer relay that is aluminum and has a red plastic bottom that also might be required if your car is an early 74.
Attached image(s) |
SirAndy |
Apr 21 2008, 03:44 PM
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#7
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Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Here is the picture of the resistor required on the brake light. that's not a resistor, that's a diode ... (IMG:style_emoticons/default/shades.gif) and here's the problem with that setup: the diode is on the ground side of the alternator warning light. it is supposed to prevent a chargeback from that circuit. the ground from the diode goes to the same ground connection as the brake light warning ground, which both are actually grounded through the emergency flasher relay!!! (IMG:style_emoticons/default/huh.gif) first sign of a faulty circuit is if you use the blinker at low rpm (idle) and both indicators just glow dimly. if you rev up the engine, the correct blinker indicator will work as expected. that means either the diode or the emergency flasher relay are faulty. a "quick" fix is to bypass the diode or add an extra ground wire to the blinker indicator lights ... (IMG:style_emoticons/default/bye1.gif) Andy PS: a buzz from the relay usually means there's a short in the circuit. turn on the key and see if there's a draw on the relay (obviously, without using the brakelights or blinkers) |
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