Jump out the 85 to 86 terminal again, dissconnect the pump, test the gray wire to ground. If you still get 6 volts then you have a bad ground or a bad connection on the gray wire or a bad connection on the ground. These pumps are 12 volts. The 6 you are recalling is the amperage. The proper current draw on a good GM pump is 5 or 6 amps.
Forget about the purple/white- wire. It's suppose to have 6 volts, it's the fuel level sensor wire. The relay does not change the voltage. A relay is just a fancy word for a switch. They call them relays because they have complex mechanisms inside of them which must work together in order for the voltage to be "relayed" to the proper spot. Think of it this way--you want a light on--your brain tells your hands to operate a 120v switch inorder for the 120v light to come on. Your brain does not use 120v to do this. Your brain is a relay for the light. See
The person who designed these connectors on these pumps should be I'm sure you can finish this sentence. Let me know.
Thursday, November 29th, 2007 AT 10:46 PM