Quantcast TRAILER BRAKES UNEVENLY OR BRAKES PULL TO ONE SIDE OR GRAB -CONT. - TM-9-2330-394-13-P0384

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TM 9-2330-394-13&P
BRAKE SYSTEM TROUBLESHOOTING - Continued
0037 00
BRAKE SYSTEM - Continued
Table 1. Brake System Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Loosen air delivery hoses to
4. TRAILER BRAKES UNEVENLY
3.
Check to see if air is present
spring brakes at delivery
OR BRAKES PULL TO ONE
at relay valve delivery
ports of ABS relay valve (LH)
SIDE OR GRAB - CONTINUED
port(s) (LH) or ABS ECU
or ABS ECU valve (RH).
valve port(s) (RH) to
affected wheel(s)/brake(s).
2.
Start towing vehicle engine.
3.
Allow brake air pressure to
build up.
4.
Depress brake pedal.
5.
While depressing brake
pedal, have assistant check
for presence of air escaping
at delivery port of ABS relay
valve or ABS ECU valve and
air hoses.
6.
Shut down towing vehicle
engine.
7.
If no air escapes, replace
ABS relay valve (WP 0067
00) or ABS ECU valve (WP
0037 00-22


 


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