Fuel pump went out. Wiring or pump?

[DK5]

Checked relay and breakers.

I'm thinking of running a new wire to the battery to test if the pump works or not..

Any advice would be appreciated! Hopefully I don't blow myself up!

 

[Kain]

i carry a spare relay to swap just for this reason , also my circuit breaker went out once so spare one of those too.
you could also make a jumper wire to test if it is relay.

 

[sweetk30]

factory tbi gm had a single red wire at the relay harnness plug for hot wire test just like you want .

if pump didnt run then check for power at fuel sender plug . if power then pump . if no power wiring problem .

 

[DK5]

Had tank dropped anyway, tried testing by using extension cord directly to pump. Made a spark.. not sure if this is good or bad

 

[DK5]

Pump is very far from fuel tank ps

 

[rampage]

9V battery. Positive goes to grey wire on plug, ground is any bare metal spot on tank. Purple wire on plug is for sending unit.

 

[DK5]

9V battery. Positive goes to grey wire on plug, ground is any bare metal spot on tank. Purple wire on plug is for sending unit.

Now I've got nothing

 

[rampage]

Now I've got nothing

That worked on my good pump and the one that was on its way out. Make sure your battery is good and wiggle the wires. If nothing still then either pump is bad or bad wiring. Either way you'll probably need to remove the pump.

 

[DK5]

That worked on my good pump and the one that was on its way out. Make sure your battery is good and wiggle the wires. If nothing still then either pump is bad or bad wiring. Either way you'll probably need to remove the pump.

Pump is removed. I tried using an extension cord so 110V it's sparked and now nothing

 

[rampage]

You hooked 110V AC to a DC motor?!?! Yep, released the magic smoke. New pump time.

 

[DK5]

You hooked 110V AC to a DC motor?!?! Yep, released the magic smoke. New pump time.

Lol ok shit :/

 

[DK5]

Warranty might cover

 

[rampage]

Good thing it didn't explode.

 

[DK5]

Good thing it didn't explode.

My girlfriend was checking on me don't worry lol

 

[rampage]

I haven't done a Public Service Announcement in a while so here goes …
If you don't know anything about electricity don't F with it!

 

[DK5]

I haven't done a Public Service Announcement in a while so here goes …
If you don't know anything about electricity don't F with it!

True dat. Live and learn. One thing that must be said is ALWAYS keep in mind safety first.
When I performed this test, even though I did it wrong, I had it outside and away from anything combustible.

 

[DK5]

Another lesson is always ask first if you want to save money! Lol!
Thanks CK5,
Time to renew membership and get more active on here..

 

[DK5]

Next question. Once I get new fuel pump, I need to rule out my electrical connection. It's quite likely no good. So I'm planning on running a new line but have no idea where it goes once it gets under the hood.

 

[skunked]

you damn near won a darwin award for that.

 

[dyeager535]

Go to the link in my signature. Download the proper electrical manual for your year. Spend the time to understand it, focus on the fuel pump circuitry. You'll be good to go.

Make sure you understand proper methods of wiring too...type of wire to use, connections, soldering, splicing, shrink tubing, etc. You can/will create serious problems that are nearly impossible to diagnose if you don't do it all properly. Worst is when it leaves you stranded somewhere.