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Relays
The relay box is located on the rear crossmember.
Air Brake Trailer Tow Relays (if equipped)
The relays are coded as follows:
Fuse/Relay
Location
Fuse Amp
Rating
Description
1
30A**
Trailer Tow Run Feed
2
30A**
Trailer Tow Park/Marker Lamps
3
30A**
Trailer Tow Stop Lamps
4
30A**
Trailer Tow Turn/Stop Lamps
5
—
Not Used
R1
—
Trailer Tow Run Relay
R2
—
Trailer Tow Stop Lamp relay
R3
—
Trailer Tow Park/Marker Lamp Relay
R4
—
Trailer Tow Park/Marker Lamp Relay
R5
—
Not Used
R6
—
Not Used
R7
—
Trailer Tow Left Turn/Stop Lamp Relay
R8
—
Trailer Tow Right Turn/Stop Lamp Relay
** Maxi Fuse
Roadside Emergencies
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