License plate and dash lights on with key on, but lheadlight switch in the off position |
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License plate and dash lights on with key on, but lheadlight switch in the off position |
HalfMoon |
Jun 23 2014, 07:50 PM
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#1
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Senior Member Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region |
I started my car tonight and noticed despite the headlight switch being fully in the off position, my dash lights are on and my license plate light is .
Odd. Never saw that before. Headlight switch I imagine.... Thoughts? David Addedum-and saw what I thought was a wisp of smoke come from under my dash at the windshield....perhaps my imagination? |
Tom |
Jul 2 2014, 08:36 PM
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#2
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
Sounds like a bad wiper motor to me. A good one should read from power input to ground of at least 1.7 ohms or greater, like 2.0 ohms or more. 1.7 ohms with 12 volts = just about 7 amps. where 2.0 ohms drops the amperage to 6.0. Too much less than that and your 8 amp fuse will blow. When it is "0" ohms, well the amps go thru the roof! Blown fuse, burned wires, etc.
If you disconnect the bad wire from fuse #8 and power up the circuit, does the 8 amp fuse blow? It shouldn't! Tom |
HalfMoon |
Jul 3 2014, 12:13 PM
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#3
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Senior Member Group: Members Posts: 828 Joined: 13-November 12 From: Shenandoah Junction, WV Member No.: 15,144 Region Association: MidAtlantic Region |
Sounds like a bad wiper motor to me. A good one should read from power input to ground of at least 1.7 ohms or greater, like 2.0 ohms or more. 1.7 ohms with 12 volts = just about 7 amps. where 2.0 ohms drops the amperage to 6.0. Too much less than that and your 8 amp fuse will blow. When it is "0" ohms, well the amps go thru the roof! Blown fuse, burned wires, etc. If you disconnect the bad wire from fuse #8 and power up the circuit, does the 8 amp fuse blow? It shouldn't! Tom Got out to the garage for a few minutes to do some testing. My current wiper motor at pin 53a reads zero ohm, so I reckon the wiper motor is in fact bad. My spare wiper motor reads the following 53a=1.900 ohm (power, right?) 53b=.500 ohm 31b=1.100 ohm 53=.340 ohm Yet (with the spare motor properly grounded) and 53a hotwired-no function :-( I've yet to soldier back together the other wires (sans the wiper motor wire) to the spade and reconnect to fuse block slot eight and power up with a fuse to see if the fuse holds. I'm sure it will. Too hot outside for contunued testing, lol. More testing later when it's cooled off a lil. |
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