Scan tool not not reading voltage correctly

Chuck Leeper

Toxic old bastard
Staff member
I'd suggest one of Caspers replacement ribbon circuits.
If the ribbon is not damaged, you may be able to clean it up with a soft pencil eraser.


What’s the disadvantages of using this to fix my problem. Or will this nit fix it. All the other lights seems to be working on my cluster .


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Update on the voltage issue. Installed Casper’s harness, the power wire coming from the wastegate . you need to switch wire to pull 12 bvolta up to alternator . Seems to work great.
Thought I had this figured out but looks like I don’t. Added a 4 gauge ground wire and cleaned up some frame grounds.. Drove the car this morning and had normal voltage until the drive home from work and dam back down to 12-10.9 volts. Have three different volt patterns. First one is normal 13,5-14.1 on scan master. Second pattern is low all the time 10.9-12.0 third pattern is low voltage at idle then climbs up as rpm’s increases then goes back down with rpm’s. Where is that ignition module? I have a Casper’s light bulb. Next thing is to change this. Don’t think this is my problem.
Hello, I had the same problem, either replace the fuse that the scanmaster is on or clean up the terminals on your old fuse. Fixed mine !!