Peterbilt - pre 1998

Peterbilt Pre 1998 - Installation Information

 
 Please Read - Important Safety Information  
   

Power

 
 There are two “unswitched” (constant power) circuits behind the dash identified with tags “Spare 4” and “Spare 5” on wires marked as circuit “230” (note: there are several “230” wires…look for the tags for these specific spares).  These wires connect directly to the fuse locations noted in the diagram (if there is no fuse currently in that location then that circuit is available for your use).  
Peterbilt pre 1998  
   

Ignition

 
These trucks have three “switched” (key-on) circuits identified with tags “Spare 1”, “Spare 2”, and “Spare 3” on wires marked as circuit “226” (again, there are several “226” circuits so look for the “Spare” and/or number tags on the wire).  Choose one of these wires, connect it to red EHUBO protective fuse, and then install a 5 amp fuse in the truck fuse panel to protect the truck portion of that wire (the EHUBO protective fuse will protect the unit itself).  
   

Ground

 
Peterbilt uses wire “239” as a ground.  Behind the dash there will be several “239” wires and they will have that number every few inches.  The wire itself may be solid black or white with a black tracer.  
   

Notes

 

Connecting to the dedicated spare circuits above is the first choice.  If none are available then connect to the power wires used for the Argo speedometer.  Generally the Argo harness will use a red wire for constant power and a black wire for switched power (confirm before connecting).  Use the truck “239” wire for ground.

There are also specific “Switched Accessory Key-On” wires (wire “242” red or white with red stripe) and “Unswitched Accessory Constant power” wires (yellow “230”) behind the dash but these serve rather heavy loaded circuits and would be a “last choice” connection point.