speedo/ odometer , grid heater stopped working and brake light on

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11-25-2012, 08:18 PM

CaledoniaOutlaw

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speedo/ odometer , grid heater stopped working and brake light on

My 91.5 had an electrical surge go throught the truck when the voltage regulator went out and blew all kinds of fuses . Sense then my speedo/odometer stopped working , brake light wont go off and the grid heaters stopped working . Could this be a problem caused by the pcm ? I replaced the speed sensor and switched the guages with no luck

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11-25-2012, 10:06 PM

Chrisreyn

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It could be the PCM, but I would check the fusible links first, located drivers side of the engine compartment right below the hood hinge..

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11-26-2012, 11:52 PM

lincolnproberts

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If it's not charging along with those others symptoms id say pcm my spedo quit also AC and it quit charging i replaced pcm after hours of agonizing wiring chasing i simply just gave the pcm a love tap and it would work went to dealer it was like 350 problem free for over a year