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Discussion Starter #1 (Edited)
I have a 2007 jeep Commander, it has factory installed 4 wire trailer lights and reciever. tried to hook up my boat trailer but the lights did not work, also installed the 7 way tow harness and the lights still do not work. It says to skip the scanstar step if the 4 way harness is installed. Is there a way to turn on the tow relay outputs without the star scan? i think that may be why the 4 wire and the 7 do not work.
 

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Get one of those 4 wire trailer connector testers - only a couple bucks. Check power right at the connector in case trailer has a problem like ground. Also check for a blown fuse on the XK. Possibly #11


Underhood Fuses one toward rear (Power Distribution Center)
Cavity Fuse/Color Description

1 40 Amp Green HVAC Blower
2 30 Amp Pink Power Outlets

3 30 Amp Pink Rr Wiper/Ign R/O
4 30 Amp Pink ABS Pump
5 50 Amp Red Cabin Htr 1 (Diesel Only)
6 50 Amp Red ASD
7 30 Amp Pink Rr HVAC (XK)
8 40 Amp Green Acc Delay/Seats
9 Spare
10 40 Amp Green Starter/JB Power
11 30 Amp Pink Cig Ltr/T-Tow
12 40 Amp Green EBL/Htd Mirror
13 40 Amp Green JB Power
14 50 Amp Red Cabin Htr 2 (Diesel Only)
15 50 Amp Red Cabin Htr 3 (Diesel Only)
16 25 Amp Natural IPM/Coils
17 Spare
18 20 Amp Yellow TCM/AC Clutch
19 20 Amp Yellow Ign Sw
 
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