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89 780 No power to fuel pump 700

posted by  rjritterjr92 on  Fri Nov 5 14:21 CST 2021
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I have an 89 780 Bosch injection with the 2.3 turbo. All I did was pull the #1 fuse and crank to release fuel pressure, then replaced the fuel pump. Now, when everything is reassembled, I have no power to the fuel pump, which is confirmed with a volt meter. The pump will not run when the key is turned or when cranking.

It was running right up until I replaced the fuel pump. I have not done a lot of tearing apart because I can't imagine something major happened somewhere else at precisely the same moment.

I did swap out a known good fuel injection relay, but no joy. I also switched the fuse with a known good fuse of the same amperage, but no joy.

Any ideas? I really can't believe this would be something complex because it was just running. But why would there be no power to the fuel pump now?
--
94 940 n/a 320k+ and rolling, owned 18 yrs; 05 XC90 2.5t for the wife; sold 92 745T; sold 88 764T






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