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93 fuel probs

galaxianx

New Member
Joined
October 21, 2003
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City, State
westwood nj
Year, Model & Trim Level
93 xlt
I need help badly!!!
Just finished testing. I'm getting these codes:

124 (M) TP voltage was higher than expected

543 (O) Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits
(M) (Service 556 code first if present) Fuel pump relay or battery power feed was open

556 (O,M) Fuel pump relay primary circuit fault

I switched out the primary relay for the fuel pump and it seemed better, but blew shortly after. Does anyone have an idea what is going on? Any help would be greatly appreciated!!
 
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Opera House

Explorer Addict
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City, State
Cincinnati, OH
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2014 Explorer 3.5L base
What do you mean "blew after that"

If you remove the relay, you can measure the resistance of the pump to ground. If you remove the fuse, you can measure the operating current of the motor with a meter. Current should be about 5A. Below 3A the engine will have problems. This is old enough that it could need a new pump or FPR. Without numbers of voltage, current and pressure there is no way to diagnose. Current flow is fuse, to relay, to inertial switch, to tank connector, to motor, and to ground.
 
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galaxianx

New Member
Joined
October 21, 2003
Messages
2
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City, State
westwood nj
Year, Model & Trim Level
93 xlt
Thanks for your help.
 
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