Electrical Question #15 Need Help Please, I'm totally stumped this time |
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Electrical Question #15 Need Help Please, I'm totally stumped this time |
76-914 |
Apr 6 2014, 06:33 PM
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#1
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,611 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
I'm going to have several electrical questions. 1st, Is pin #8, on the 14 pin plug at the relay board, the only switched 12v+ source in the engine compartment? TIA, Kent
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Spoke |
Aug 8 2021, 06:41 PM
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#2
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Jerry Group: Members Posts: 7,052 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Seems confusing as the foglight switch should not have 12V on the case. There are 3 wires on the foglight switch.
Foglight: pin 15: goes to the headlight switch and brings 12V power to the switch. pin K: Is the switched 12V to the foglight relay. Switch in: 15 to K is open circuit; Switch out: 15 to K is shorted. pin 31: This is ground mainly to light up the switch lamp. Does the foglight switch lamp light up? If you think the foglight switch is shorting 12V to the case, remove all wires from the switch and remove the switch. Check the resistance from 15, K, and 31 to the case of the switch. 15 and K should be open circuits WRT the case. A simplified circuit of the headlights and foglights is attached. Notice that the foglight relay is grounded through pin 86 to the high beam headlights. This way when the high beams are on the foglights should turn off. Attached thumbnail(s) |
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