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86 fuel pump relay
Posted 11 August 2009 - 09:29 AM
Posted 11 August 2009 - 09:58 AM
That is the Fuel Pump Control Unit, sometimes labeled *rev sensor* on the wiring diagrahms.
The yellow wire is a tach pulse(from neg side of coil)
When the unit recieves a tach pulse (from a cranking engine) it sends power though to the fuel pump (Blue wire w/orange stripe or black stripe).
You should test that unit to make sure it
A) has 12v to it with the Key on. And that the black wire is ground.
get's a coil pulse while cranking (test with RPM function on Multimeter)
C) gives power to the Fuel pump wire during cranking.
Posted 11 August 2009 - 01:15 PM
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