fuel pump fuse blowing

[edwardburak@erols.com]

 Hello have a 1969 280 sl doing a total restoration
 Just recently l have had the fuel pump fuse #4 Blow when turn ignition switch on . any ideas where to start looking , ' engine had run before , with a new fuel pump. Any help thanks

[dirkbalter]

Have you replaced the fuse and did it blow again?

[Kevkeller]

Remove the wire on the pump and replace the fuse. See if it blows again. If it does it’s probably not the fuel pump but a short somewhere.

[roymil]

"New" fuel pump probably actually means rebuilt.   I know the first time I rebuilt mine I wasn't particularly careful about polishing the impeller and double checking that it spun freely with the cover on.  It was noisy and eventually stopped and blew the fuse when it did.   I pulled the bottom cover and polished up the impeller and the mating surfaces really well to get it going smoothly again.

[edwardburak@erols.com]

yes continues to Blow the fuse

[afibbe]

The first thing I would look at are the wires that come down through the trunk.

When I removed my pump, I found the wire insulation under the plastic wire sleeve in poor condition.  It is possible that moving the wires during the pump work has caused a short.