 Dual relay bad?, Dual relay bad? |
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| gerziebaker |
 Jan 10 2011, 12:37 PM
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#1
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Newbie  Group: Members Posts: 17 Joined: 28-April 05 From: Macon, GA Member No.: 3,999  |
My buddy's car just quit running. It's a 1974 1.8L. He said he only has 1 volt coming from the coil. When he disconnected the yellow wire going from the dual relay to the negative side of the coil the voltage is 12.7. Is this a bad dual relay?
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| Cevan |
Jan 10 2011, 01:08 PM
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#2
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
The dual relay gets power from the coil when the key in on or in the start position. This in turns trips one side of the relay and powers the ECU, the resistors, and the AFM.
When the key is in the starting position, the other half of the relay gets power through the terminal at the starter. This trips the second relay and power goes to the AAR and the fuel pump. Once the engine is running, the AFM flaps stays open, letting power go to the second half of the relay and powering the AAR and fuel pump. |
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Posts in this topic
gerziebaker Dual relay bad? Jan 10 2011, 12:37 PM
underthetire Why would there be a wire from a relay to the - si... Jan 10 2011, 12:47 PM Root_Werks L-Jet uses the neg side of the coil for triggering... Jan 10 2011, 12:50 PM
underthetire
L-Jet uses the neg side of the coil for triggerin... Jan 10 2011, 12:56 PM dr914@autoatlanta.com Hopefully it was a white/beige wire.
L-Jet uses... Jan 10 2011, 01:04 PM jim_hoyland The yellow wire from the dual relay should not be ... Jan 10 2011, 04:05 PM r_towle http://manuals.type4.org/ljet/ Jan 10 2011, 08:09 PM jim_hoyland See pic: Jan 10 2011, 09:37 PM |
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