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My '71 142E is finally back on the road 140-160

posted by  PeterHayden91EPB on  Mon Jul 29 06:04 CST 2013
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last visit: Thu Oct 17 19:37 CST 2013
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I'm not sure what's making you cringe. The relays are fine, and the fuse was confirmed to be intermittently passing power. Jumper pump to one side and it works. Jumper to the other side and it doesn't. Cleaning the contacts made it work consistently. I'd call that a smoking gun. And it is a dedicated fuse in a separate fuse box as delivered from the factory 42 years ago.

The schematics and repair books all show the blocking diode on the main power relay. In this case, had the problem been a relay, it would have been the fuel pump relay, not the main one because I was getting power to everything else on that circuit, including activation of the fuel pump relay.

Oh, and a locked rotor on the pump won't make noise.






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