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multimeter testing of fuel pump relay 700 1991

posted by  Allanwayne on  Tue Jul 6 12:05 CST 2004
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last visit: Sun Jul 8 15:05 CST 2012
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Mine is a 91 740 turbo with the white relay, so I assume yours is the same.

You need a multimeter for this.

Here are some readings from 2 such relays:

resistance between terminal 30 and 86/1 = 87 ohms brand new relay

resistance between terminal 30 and 86/1 = 80.1 ohms older relay (car starts and runs well with it)

Resistance readings between all other terminals was infinite on both relays.

At what point does the resistance increase or decrease to make the car run lousy? Good question - worthy of a brickboard survey

Hope this helps.






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New fuel pump relay?? [700][1991]
posted by  gargamel19  on Mon Jul 5 13:04 CST 2004 >


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