BOTH COMBINATION TAIL AND STOPPLIGHTSTOPLIGHTS DO NOT WORK WHEN ONLY ONE BRAKE IS APPLIED

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

11. ONE COMBINATION TAIL AND STOPLIGHT STOPLIGHT DOES NOT WORK - CONTINUED

WARNING

Although ignition lock switch must be on and battery ground cable connected to test electrical circuit

voltage, turn off ignition lock switch and disconnect battery ground cable before doing resistance tests or

replacing parts. This will keep you from getting shocked and prevent damage to parts and equipment.

If multimeter reads 0 ohm, repair orange wire in rear light wiring harness (page 2137).

Plug brown wire terminal (1) into connector (2).

If multimeter reads more than 0 ohm, go to Electrical Malfunction 9: One Combination Tail

And Stoplight Taillight On Loader Backhoes With Serial Numbers 319995 Thru 342573

Does Not Work, steps 2 and 3 (page 2-72).

12. BOTH COMBINATION TAIL AND STOPPLIGHTSTOPLIGHTS DO NOT WORK WHEN ONLY ONE BRAKE IS

APPLIED

WARNING

Although ignition lock switch must be on and battery ground cable connected to test electrical circuit

voltage, turn off ignition lock switch and disconnect battery ground cable before doing resistance tests or

replacing parts. This will keep you from getting shocked and prevent damage to parts and equipment.

Step 1.

On side for which applied brake does not light stoplights, pull connector (3) off of brake light pressure

switch terminals (4 and 5), connect jumper wire between red wire terminal (6) and orange wire

terminal (7). Turn ignition lock switch (8) clockwise to ignition. Check to see if stoplights (9) are lit.

Turn ignition lock switch (8) counterclockwise to off. Remove jumper wire.

If stoplights (9) light, replace brake light pressure switch (page 2-476).

If stoplights (9) do not light, go to step 2.

Step 2.

Turn ignition lock switch (8) clockwise to ignition. Using multimeter set to 30 vdc, place red probe on

red wire terminal (6) and black probe on rear axle housing (10). Check for 11 to 13 vdc on multimeter.

Turn ignition lock switch counterclockwise to off.

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