Peterbilt Pre 1998 - Installation Information |
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| Please Read - Important Safety Information | |
Power |
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| 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). | |
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Ignition |
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| 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 |
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| 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 |
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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. |