New Holland 1513 – UCM: Right Brake Lights Short to Power

The Universal Control Module (UCM) or Vehicle Control Module (VCM) has detected that the electrical circuit for the right brake light is receiving continuous voltage, even when the brake pedal is not depressed. This short to power condition can cause the right brake light to remain permanently illuminated and may lead to other related electrical malfunctions.

• T1510
• T1520
• T1530
• T2210
• T2220
• T2310
• T2320
• T2330
• T2410
• T2420
• TC18
• TC21
• TC21D
• TC21DA
• TC23DA
• TC24D
• TC24DA
• TC26DA
• TC29D
• TC29DA
• TC30
• TC31DA
• TC33D
• TC34DA
• TC35A
• TC40A
• TC45A
• TC48DA
• TC55DA
• TD55D
• TD60
• TD60D
• TD70
• TD70D
• TD75D
• TD80
• TD80D
• TD85D
• TD90
• TD90D
• TD95
• TD95D
• TD5010
• TD5020
• TD5030
• TD5040
• TD5050
• TL65
• TL70
• TL80
• TL90
• TL100
• TN55
• TN65
• TN70
• TN75
• 3050
• 4055
• 4060
• 1215
• 1220
• 1320
• 1520
• 1620
• 1920
• 2120

1. 1

   Perform a visual inspection of the right brake light assembly, wiring harness, and connectors for frayed or melted wires, corrosion, or a damaged bulb socket

2. 2

   Check the brake light bulb to ensure it is not damaged and is the correct type for the machine

3. 3

   Test the brake light socket with a multimeter; there should be no voltage present when the brake pedal is not depressed

4. 4

   Isolate the short by disconnecting the wiring harness at various points between the brake light and the control module to see when the voltage drops

5. 5

   Inspect the brake light switch to ensure it is not malfunctioning or stuck in the 'on' position

1. 1

   Clear fault code

   Clear the fault code from the system, operate the machine, and check if the code returns before proceeding with further repairs.

2. 2

   Repair wiring harness

   If the short is isolated to the wiring harness, repair or replace the damaged sections. Ensure all connections are clean and secure.

3. 3

   Replace faulty components

   If the bulb, bulb socket, or brake light switch is found to be damaged or malfunctioning during inspection, replace it with a new part.

4. 4

   Verify repair

   Re-test the circuit to ensure the short to power has been eliminated. Operate the brake pedal several times to confirm the light functions correctly.