Revision 1.0
16
6.2
Trailer to Tractor Connection Test
Testing of full system using a battery load tester:
Start with testing each individual battery on both tractor and trailer before proceding
to check the system:
Tractor Test:
1. Ground battery load tester on tractor chassis point (d)
Hook up positive load tester cable on positive pole of single
pole plug at end of tractor coil cord (a)
Run load test- This will test entire circuit on tractor including ground
from batteries to tractor chassis
Trailer Test:
2. Ground battery load tester on trailer chassis (c)
Hook up positive cable on positive pole of single pole plug
recepticable on trailer (b)
Run load test - This will test entire circuit on trailer including circuit breakers &
ground between trailer batteries and trailer chassis.
Tractor and Trailer charging system test while connected:
3. Ground battery load tester on tractor chassis (d)
Hook up positive cable on positive pole of single pole plug
recepticable on trailer (b)
Run load test- This will test entire circuit on tractor - trailer including
ground between tractor and trailer and circuit breaker on trailer.
A simple low amp voltage test at the front of the trailer or at the tractor
will not show insufficient connections or ground problems
CROSS TEST ON ENTIRE CHARGE SYSTEM
SINGLE POLE PLUG SET UP
b
d
a 12 Volt lead from tractor coil cord
b Center (+) plug on front of trailer
c Trailer ground on front of trailer
d Tractor chassis ground
cb
cb
a
c
c