Peterbilt Pre 1998 - Installation Information |
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| Please Read - Important Safety Information | |
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Peterbilt trucks built between 1998 and 2005 have one additional “unswitched” spare circuit (“Spare 8”) and two additional “switched” spare circuits (“Spare 6” and “Spare 7”). The wire numbers (“230” and “226”) will be the same as the earlier trucks (although it is possible that some trucks use a different number for one or more of the spare wires). |
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Power |
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Later Peterbilt (2005 and later) have “snap in” accessory “power point” connections behind the dash center section that mate with the Peterbilt two wire P92-6478-0075 pigtails (you will need two pigtails for each truck). When snapped into place the pigtail will give you one orange powered wire and one white ground wire that can be used to connect to the EHUBO protective fuse. Each “power point” connection has a fuse location in the truck fuse box, some are “constant” and some are “switched”. First choice is to use circuit “24-36” for constant power and circuit “7-37” for switched power (adapt to another power point connection as needed if those particular circuit numbers are already occupied). |
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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. |