95 Speedo died...
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Logistics Pro
Joined: Nov 2010
Posts: 4,654
Likes: 20
From: Tewksbury, MA
95 Speedo died...
Sorry if this issue has been touched upon before i could not find anything in the search tool. I have a 95 I6 with a 5spd and the speedometer and odometer died (odometer doesn't display anything) one day after i went to turn it on and i had my dad check the PSOM board and from his best judgment he said the board is dead. The needle was bouncing alot around 30-40 and then 60-70mph but i thought nothing of it at the time. So I got a new cluster off of eBay (with tach) and plugged it in but the speedo and Odometer still don't work and my fuse isn't blown. I have not checked the connector for power because i am not sure which pins to check does anyone have any ideas? Atleast i have a tach now so i can judge better how fast I'm going lol.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
There are two fuses for the PSOM, Fuse 8 is always hot, Fuse 18 is hot with the key in the Run position. Use a meter to verify you have voltage at Pin 1 with reference to Pin 2. This the voltage from Fuse 8. Then check for voltage at Pin 3 with reference to Pin 2. This from Fuse 18 with the key in the Run position.
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Logistics Pro
Joined: Nov 2010
Posts: 4,654
Likes: 20
From: Tewksbury, MA
There are two fuses for the PSOM, Fuse 8 is always hot, Fuse 18 is hot with the key in the Run position. Use a meter to verify you have voltage at Pin 1 with reference to Pin 2. This the voltage from Fuse 8. Then check for voltage at Pin 3 with reference to Pin 2. This from Fuse 18 with the key in the Run position.
Cargo Master
Joined: Mar 2007
Posts: 2,935
Likes: 34
From: Arcadia, Fla
1st question: Does your dome light work? If not and the bulbs good, check that fuse and make sure the dome light is not shorting out.
2nd question: What year cluster did you install? The PSOM's are the same from 92 to 96/97 but the clusters are wired diffrent and you can have a charging issue or some indicator lights may not be correct.
You can swap the your original PSOM into the tach cluster if it is functional. That way you keep your mileage and speedo ratios for you truck. Other wise your milage and speed could be off till you reprogram the PSOM ratio setting.
2nd question: What year cluster did you install? The PSOM's are the same from 92 to 96/97 but the clusters are wired diffrent and you can have a charging issue or some indicator lights may not be correct.
You can swap the your original PSOM into the tach cluster if it is functional. That way you keep your mileage and speedo ratios for you truck. Other wise your milage and speed could be off till you reprogram the PSOM ratio setting.
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Thread Starter
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Logistics Pro
Joined: Nov 2010
Posts: 4,654
Likes: 20
From: Tewksbury, MA
1st question: Does your dome light work? If not and the bulbs good, check that fuse and make sure the dome light is not shorting out.
2nd question: What year cluster did you install? The PSOM's are the same from 92 to 96/97 but the clusters are wired diffrent and you can have a charging issue or some indicator lights may not be correct.
You can swap the your original PSOM into the tach cluster if it is functional. That way you keep your mileage and speedo ratios for you truck. Other wise your milage and speed could be off till you reprogram the PSOM ratio setting.
2nd question: What year cluster did you install? The PSOM's are the same from 92 to 96/97 but the clusters are wired diffrent and you can have a charging issue or some indicator lights may not be correct.
You can swap the your original PSOM into the tach cluster if it is functional. That way you keep your mileage and speedo ratios for you truck. Other wise your milage and speed could be off till you reprogram the PSOM ratio setting.
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