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instrument cluster

Sent to Car Experts September 07 02:31 PM

none of my son's instruments work on his 91 f250, not even the speedometer, it bounces when driving. i have checked everything and can not figure it out. there is no voltage regulator for this trucks instrument cluster.
it is to expensive to go to the dealer so i would like to know how do i fix the this problem?

Customer (name blocked for privacy)
Status:  Closed   Value: $5
Answer
September 7 9:00 PM (6 hours and 29 minutes and 29 seconds later)
         
ACCEPTEDCheck Mark
The speedo bouncing can be either a speedo cable or speedo head problem and can be rebuilt or the cable replaced.Remove the speedo gear at the trans and inspect the plastci gear,if it looks ok,hook up a cordless drill to the speedo cable and spin it up,see if it is binding,spray it with some wd-40.If it still bounces it is in the head. As far as the gauges go, it has a voltage regulator built into the cluster on the back.Check all fuses and power going into the cluster.On older trucks and cars you can usually get a service manual out of your local library for more info.

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Gene -- Auto Service Technician -- 99% Positive Feedback on 501 Car Accepts
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Reply
September 8 12:40 PM (15 hours and 39 minutes and 47 seconds later)
         
I have a manual for the this yr truck but no way to get me and my chair to the library. I don’t mean to inconvenience you but could you tell me were this voltage regulator is. It is not in the manual I have but there is one for the 1992 f250 and up. Thank you for the suggestion about the speedometer cable. I know the pinion gear on it is good but never thought of using a drill.
Customer (name blocked for privacy)
Answer
September 8 6:31 PM (5 hours and 50 minutes and 34 seconds later)
         
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Gene -- Auto Service Technician -- 99% Positive Feedback on 501 Car Accepts
ASE Master w/L1 Advanced Engine Performance, Ford Trans Tech/SMT, Toyota, Mitsubishi,Hyundai Tech.
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