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Brain frazzler 700 1989

posted by  jonasff64 on  Fri Apr 1 19:11 CST 2005
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This one's a puzzler. I had mentioned my 740 wagon was down. It turns over, but no spark, no fuel because the #1 fuse blows as soon as I turn the key to the on (not start) position. I've been short hunting, and in the process found that both fuel pumps work fine. I know this because as per the excellent resources on this site, I jumped the relay board contacts (30 and 87/2 of the fuel relay) and both pumps sprung to life... without the key being in the ignition. They kept working when I turned the ignition on and the fuse didn't blow. After that I opened the relay, cleaned the contacts, and resoldered the board. When I put the relay back in and turned the key, the fuse blew again instantly. Does the fact that the pumps worked without turning the key mean that something is shorting on this circuit, or is this normal and I should concentrate on the other side of the relay? Any ideas??






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