Code 542

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Old Jan 13, 2005 | 05:59 PM
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From: Spring, Tx
Question Code 542

I have a 94 f150 4x4 with a 5.8l engine and i cant get the fuel pumps to work. The code i get is 542. I dant have a schmatic but i have been tracing the wires with no luck. Any suggestions?
 
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Old Jan 13, 2005 | 07:00 PM
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From: poquoson virginia
542
Fuel Pump Circuit Open–PCM To Motor Ground

Check the fuel pump relay.

Robbie
 
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Old Jan 14, 2005 | 09:20 AM
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Which one is it. there is a bank of four. i have tried moving them around with no luck.
 
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Old Jan 15, 2005 | 09:14 AM
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The fuel pump relay should be the green one. The brown is the pcm power relay. Also check the fuel pump fuse. If you still have the owners manual, look it up for exactly where it is.

Robbie
 
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Old Jan 18, 2005 | 07:14 AM
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the problem was found in the fuel pump switch. it had bad contacts
 
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