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1999 ford truck trip computer not working

It appears as know power. all fuses good test light shows power at trip computer connector

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  • Cars & Trucks Master
  • 14,036 Answers

If power going to pcm more likely it could have failed i would code scan see if you get pcm failed fault code you dont need to buy a new pcm if you dont need one they are expensive.

Posted on Feb 13, 2012

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Posted on Jan 02, 2017

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SOURCE: not charging

Possibly a fusible link somewhere in the circuit has burned through and disconnected the circuit.A wiring diagram would be needed to look for the location of any fusible links Ohms check the wires involved in the alternator charging circuit to verify continuity.

Posted on Aug 29, 2008

mcgyver468
  • 710 Answers

SOURCE: my truck 1999 ford expidition was at idle and just

MAYBE NOT. SWAP THE WIPER RELAY FOR THE FUEL PUMP RELAY TO SEE IF THE PUMP TURNS ON. IF IT DOES NOT OPERATE, THEN WHILE SOMEONE TURNS THE KEY TO THE ON POSITION, BANG ON THE BOTTOM OF THE FUEL TANK AND REPEAT THIS AND YOU SHOULD HEAR THE PUMP AFTER A FEW JOLTS TO THE PUMP MOTOR. IF THE PUMP DOES TURN ON, THEN DRIVE IT TO WHERE EVER YOU PLAN ON HAVING IT REPAIRED. THIS MAY ONLY RUN ONE OR TWO TIMES USING THIS METHOD. IF YOU NEED TO BANG ON THE TANK TO JAR THE PUMP LOOSE, THEN IT NEEDS TO BE CHANGED. HOPE THIS HELPS YOU TO RESOLVE THIS ISSUE. PLEASE KEEP ME POSTED. THANK YOU FOR USING FIX-YA AND THANKS IN ADVANCE FOR AN HONEST RATING. BEST OF LUCK

Posted on May 15, 2009

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