Crazy speedometer help...
New User
Joined: Mar 2013
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I will post my results
Cargo Master
Joined: Mar 2007
Posts: 2,935
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From: Arcadia, Fla
Also check the capacitor for leaking acid. Its the round can just left of the connector. That cap has failed on my E350 and caused bunch of wierd problems. It the area under the cap is dammaged, there is a thread here on how to clean it off and hope the PCboard was not dammaged badly like mine was. If its really bad, better to replace the PSOM and reprogram the raito back in the new one. But the milage will be diffrent going that route.
Yesterday I got another 96/97 Cluster with tach from the junk yard! That was the only one out of 40~50 trucks there!
Yesterday I got another 96/97 Cluster with tach from the junk yard! That was the only one out of 40~50 trucks there!
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1) closeup of the culprit that many have found fixed these issues
2) full picture of the board on back of the speedometer section.
2) full picture of the board on back of the speedometer section.
Last edited by Pappashine; Apr 2, 2013 at 06:28 PM. Reason: trying to add another picture
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I was so happy to find this diode to be loose, figured since it basically fell off in the hand once it was touched then that had to be my fix.
Well it was carefully soldered back and re-installed.
I am sad to say that this did not fix me issues.
1) new speed sensor
2) resoldered the loose diode
3) ?----NEED HELP
Well it was carefully soldered back and re-installed.
I am sad to say that this did not fix me issues.
1) new speed sensor
2) resoldered the loose diode
3) ?----NEED HELP
New User
Joined: Mar 2013
Posts: 11
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OK, I am now really stumped. I thought I had gotten lucky and found an entire cluster with only 1500 miles difference. UPS brought it today and I ran out to get this swapped. I rolled up the road and at 45 yeah not much fluctuation. Got on the interstate and hit 65 and here we go again
I cannot imagine this junkyard cluster to have this same issue, but my luck makes me think it is possible. Should I keep buying clusters? I really need help here...
1) changed VSS
2) RESOLDERED YELLOW DIODE
3) PUT IN JUNKYARD CLUSTER
4) PLEASE HELP............
I cannot imagine this junkyard cluster to have this same issue, but my luck makes me think it is possible. Should I keep buying clusters? I really need help here...
1) changed VSS
2) RESOLDERED YELLOW DIODE
3) PUT IN JUNKYARD CLUSTER
4) PLEASE HELP............
Cargo Master
Joined: Mar 2007
Posts: 2,935
Likes: 34
From: Arcadia, Fla
Look for the capacitor(black can) and see if it has any green/black goo on the pcboard. Also check for good power and grounds to the PSOM.
Also check the wireing back to the VSS and leave the ABS module disconnected from the VSS sensor.
It is possable to get a bad PSOM, the cluster I got last month I found the PCB totaly rotted from the leaking capacitor to where I could not fix it(just wanted the tach cluster anyway)
Also check the wireing back to the VSS and leave the ABS module disconnected from the VSS sensor.
It is possable to get a bad PSOM, the cluster I got last month I found the PCB totaly rotted from the leaking capacitor to where I could not fix it(just wanted the tach cluster anyway)
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