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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#21
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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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76-914 |
Nov 23 2014, 08:44 PM
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#22
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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 |
Well guess what. The Suby Computer didn't like it one bit. It idled up n down between 500-1200rpm every 1.5-2 seconds. Disconnected that relay from the circuit and it idles normal again. I'll have to think about this one. It's very easy to reconnect that relay later if needed.
FWIW, it worked as intended as far as not starting in gear. EDIT: I just had a thought. I'm pretty sure it was in reverse when the idle began to oscillate wildly. I shut it down immediately and removed the relay before confirming that it would do the same thing in forward or neutral! What if my backup lights let some voltage back thru the backup switch, which shares the same ground post and is located within 3" of the neutral switch. |
Spoke |
Nov 24 2014, 09:55 AM
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#23
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Jerry Group: Members Posts: 7,052 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Well guess what. The Suby Computer didn't like it one bit. It idled up n down between 500-1200rpm every 1.5-2 seconds. Disconnected that relay from the circuit and it idles normal again. I'll have to think about this one. It's very easy to reconnect that relay later if needed. FWIW, it worked as intended as far as not starting in gear. EDIT: I just had a thought. I'm pretty sure it was in reverse when the idle began to oscillate wildly. I shut it down immediately and removed the relay before confirming that it would do the same thing in forward or neutral! What if my backup lights let some voltage back thru the backup switch, which shares the same ground post and is located within 3" of the neutral switch. I'm confused on why the ECU would sense what you've done with the neutral switch. Are there connections from the neutral switch to the ECU that you didn't show in your diagrams? If there are ECU connections, measure the voltage across the switch in neutral or in gear. You would be able to use a pre-biased transistor to interface the switch. |
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