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Something else 200

uid 18083's pic
posted by  lucid on  Mon Apr 4 12:32 CST 2011
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Three things affecting the Pump relay:

• Fuse 7 (hot from battery) feeds +12V to the pump relay terminal 30.
When relay is energized, the +12V goes from relay terminal 87 to the pumps.
Make sure fuse 7 and it's contacts are clean and tight.
Spinning the fuse in it's contacts is sometimes a quick fix.

• Fuse 13 (Hot with Key On) powers the pump relay coil at terminal 15.
As with #7, make contacts clean and tight.

• Besides 12V at terminal 15, the Pump relay also needs negative Ignition coil pulses at terminal 31b (Red/White wire). These pulses come from Coil terminal 1. Take that connector off and on a couple of times. Terminal 15 too, while you're there.

--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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