Fog lights not getting power, What else to check? |
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Fog lights not getting power, What else to check? |
saigon71 |
Dec 15 2018, 01:27 PM
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#1
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Senior Member Group: Members Posts: 1,999 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
My fog lights don't work on either side. After trying different bulbs, I tested for power with a VOM - no power. Next, I swapped the fog light relay out with several others...still no power.
What are the next logical things to check? Do the fog light switches go bad? Thanks. |
DickSteinkamp |
Dec 15 2018, 02:32 PM
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#2
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Senior Member Group: Members Posts: 500 Joined: 27-February 17 From: Bellingham, WA Member No.: 20,876 Region Association: None |
You are probably way ahead of me on this, but just to be sure...
The key has to be on and the headlights have to be on low beam. |
porschetub |
Dec 15 2018, 03:35 PM
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#3
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Advanced Member Group: Members Posts: 4,699 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
You are probably way ahead of me on this, but just to be sure... The key has to be on and the headlights have to be on low beam. Good points,you could check for voltage @ your fuseboard ,foglight relay pin #30 to at least isolate that as an issue then you know its further down the line,if that's ok it may be your switch but less likely. Go well (IMG:style_emoticons/default/beerchug.gif) . |
saigon71 |
Dec 22 2018, 04:53 PM
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#4
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Senior Member Group: Members Posts: 1,999 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region |
You are probably way ahead of me on this, but just to be sure... The key has to be on and the headlights have to be on low beam. Good points,you could check for voltage @ your fuseboard ,foglight relay pin #30 to at least isolate that as an issue then you know its further down the line,if that's ok it may be your switch but less likely. Go well (IMG:style_emoticons/default/beerchug.gif) . I've got 12V at fuse #10 and foglight relay pin #30. |
Spoke |
Dec 24 2018, 12:28 PM
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#5
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I've got 12V at fuse #10 and foglight relay pin #30. 12V at fuse #10 is good. #10 also powers the horn. What voltage do you read at foglight relay pin 85? Should be 12V. This voltage comes from the foglight switch. Once 12V at pin 85 is verified, check foglight relay pin 86. Pin 86 should be 0V with headlights on and on low beams. Pin 86 is connected to fuse #1/#2 which power the high beams. Once 12V at pin 86 and 0V at pin 85 on foglight relay are verified, measure foglight pin 87. Should be 12V. Pin 87 powers the foglights. Does the lamp on the foglight switch light up? Is the lamp on the foglight switch good? |
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