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Horn works now but speedo still dead

k5warwagon

1/2 ton status
Joined
Feb 25, 2009
Posts
416
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Location
Middleburg, NC
It moves about 1/4 when you start the truck but doesn't work. Cruise has never worked. Help please.
Thanks,
 
Last edited:
Either the sensor in your tailshaft of the transfercase has failed, or your DRAC (little clear or yellow box with a 4 number code printed on it) has failed
 
1990-91 trucks have a digital speedometer instead of the cable used on the older trucks.

There's a sender thing at the t-case, and then the magic box (which I stink is the DRAC) which IIRC lives on the back of the cluster or in the dash up there somewhere.

Search on it, lots of good info.

-- A
 
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