 Voltage irregularities, Where do I go from here? |
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| aveale |
 Aug 16 2006, 06:19 AM
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#1
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Fun Times  Group: Members Posts: 194 Joined: 18-August 04 From: Ottawa, Canada Member No.: 2,563  |
Family,
My E-Brake light is contsantly flashing now (Big deal - check the switch). I dismantled the switch and used a voltmeter. The volt meter registered only 4-5 volts as opposed to the required 12V to close and complete the circuit to shut off the flasher. Other than that, everything else works fine. Anyone know how this voltage could be so low? I am thinking i have a weak + wire from the flasher as my ground is solid - but I don't know how to verify this low reading. Anyone know, in the event I cannon get my Voltage problem rectified, how I can disable the E-Brake flashing light? Thank you in advance, Tony |
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| bd1308 |
Aug 16 2006, 07:25 AM
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#2
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
push the button on your M/C
Didnt work for me (mine doesnt have a button) but should work for you. b |
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| aveale |
Aug 16 2006, 07:58 AM
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#3
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Fun Times Group: Members Posts: 194 Joined: 18-August 04 From: Ottawa, Canada Member No.: 2,563 |
tried that one.
In fact that is an entirely different issue. Looking for a new approach! Cheers, T |
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| Dave_Darling |
Aug 16 2006, 08:45 AM
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#4
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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AFAIK, the switches work by grounding the wire from the light. 5V or 12V, I don't think should make a difference.
Try unplugging the brown/white wire from the master cylinder switch. Try unplugging the wire from the button under the e-brake handle. (Don't let it short to ground!) --DD |
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| aveale |
Aug 16 2006, 08:52 AM
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#5
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Fun Times Group: Members Posts: 194 Joined: 18-August 04 From: Ottawa, Canada Member No.: 2,563 |
dave,
what happens if you short it to ground? have i fried something and if so, what......... T |
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| Dave_Darling |
Aug 16 2006, 10:45 AM
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#6
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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QUOTE(aveale @ Aug 16 2006, 07:52 AM)  what happens if you short it to ground? The light starts blinking again, that's all. That's how the circuit works; the brown/white wire gets shorted to ground (by the appropriate switch) and the light starts going blinky-blinky-blinky... (IMG:style_emoticons/default/lol2.gif) --DD |
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| davep |
Aug 16 2006, 11:11 AM
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#7
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914 Historian Group: Benefactors Posts: 5,143 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
Unlike house wiring where a switch is on the hot side, many 914 circuits have the switch on the ground side of things. Just a small attitude adjustment. Check your fuse box for problems. Another trick is to use a couple of wires attached to the battery posts and a voltmeter. DON'T short those wires out! Use the two wires to check voltage differences between various points and the battery. This can reveal bad grounds and bad sources, especially under load.
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| aveale |
Aug 16 2006, 01:19 PM
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#8
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Fun Times Group: Members Posts: 194 Joined: 18-August 04 From: Ottawa, Canada Member No.: 2,563 |
now we are talking.
i am doing some brake bleeding tonite (fun) and i will reset the switch and check the grounding points. Thanx y'all T |
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| jk76.914 |
Aug 16 2006, 02:47 PM
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#9
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Senior Member Group: Members Posts: 809 Joined: 12-April 05 From: Massachusetts Member No.: 3,925 Region Association: North East States |
QUOTE(Dave_Darling @ Aug 16 2006, 08:45 AM) QUOTE(aveale @ Aug 16 2006, 07:52 AM) what happens if you short it to ground? The light starts blinking again, that's all. That's how the circuit works; the brown/white wire gets shorted to ground (by the appropriate switch) and the light starts going blinky-blinky-blinky... (IMG:style_emoticons/default/lol2.gif) --DD (IMG:style_emoticons/default/agree.gif) Anything you want to flash gets grounded to turn it on. That's so they only needed one flasher in the entire car- turn signals, 4-way flashers, e-brake light, and (in my car) the fasten seatbelt light. Anything you hook to the flasher output will flash when the other sided is grounded, without the others flashing.... |
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| aveale |
Aug 17 2006, 01:16 PM
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#10
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Fun Times Group: Members Posts: 194 Joined: 18-August 04 From: Ottawa, Canada Member No.: 2,563 |
well thanks again 914club.
turns out SOMETIMES my flasher lights when my MC switch has flipped and sometimes it don't. Good brake bleed and no more bells and whistles.....for now. Cheers and have a good weekend. T |
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