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INSTALLATION MANUAL
Level of Difficulty
Easy
Installation difficulty levels are based on time
and effort involved and may vary depending on
the installer level of expertise, condition of the
vehicle and proper tools and equipment.
Wiring Location(s)
T5
Wiring Location Guide*
for Trucks (T)
T1 Behind driver side taillight housing
T2 Behind passenger side taillight housing
T3 Behind driver side rear bumper
T4
Behind center of rear bumper fascia
T5 Behind passenger side rear bumper
T1
T2
T3
T4
T5
* Representative vehicle shown
Tools Required
Drill
Fishwire
Drill bit, 3/32"
Electrical tape
Panel trim
Cutting tool
removal tool
58987-INS-RA
•
04/20/2021
•
WARNING
Do not exceed product rating or tow vehicle lamp load rating, whichever is lower.
Product Photo
NOTICE
Before you begin installation, read all instructions thoroughly.
Proper tools will improve the quality of installation and reduce the time required.
All steps must be followed to ensure the product will function properly. Once installed,
test for proper function by using a test light or connecting a properly wired trailer.
Maintenance
Periodic inspection of all wires and connections should be performed
to ensure there is no visible damage or loose connections.
ECN8140
•
PAGE 1 OF 4
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Summary of Contents for Curt Manufacturing 58987
- Page 1 Periodic inspection of all wires and connections should be performed to ensure there is no visible damage or loose connections. * Representative vehicle shown Tools Required Drill Fishwire Drill bit, 3/32" Electrical tape Panel trim Cutting tool removal tool 58987-INS-RA • 04/20/2021 • ECN8140 • PAGE 1 OF 4...
- Page 2 Once the custom wiring harness is installed, verify that the harness is functioning by attaching the 4-flat to any vehicle with functioning trailer lights. The taillights on the tow vehicle should function along with the taillights on the towing vehicle. 58987-INS-RA • 04/20/2021 •...
- Page 3 Fish wire could be anything from a cut-up wire hanger, stiff wire, rope or string depending on what is needed for the installation. 58987-INS-RA • 04/20/2021 • ECN8140 •...
- Page 4 Use a zip tie to fasten any excess wire to a solid spot along the driver-side inner fender. Reinstall all items removed during install. If it was disconnected at the beginning of the installation, reconnect the negative battery terminal. Install the provided 4-flat dust cover to help prevent corrosion. 58987-INS-RA • 04/20/2021 •...
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