Instrument Display Turn Signal Indicators Do Not Blink When the Signal Switch is Activated{1430} Caterpillar


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Instrument Display Turn Signal Indicators Do Not Blink When the Signal Switch is Activated{1430} [TIBU7757]
ELECTRICAL AND STARTING SYSTEM
LIGHTING GP
1.1. Introduction
2.1. Problem
3.1. Required Parts
4.1. Solution
5.2. Mounting Hardware
Wheel Dozer:
834K (S/N: LWY614-615)
Wheel Loader:
988K (S/N: LWX520-523; TWX362-416)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

Effective with the machine serial numbers listed above, LED signal lights were used. On some machines the lower LED voltage draw will not operate the flasher module for the turn indicators in the cab. The turn indicators in the instrument display stay on solid when the signal switch is activated. The signal lamps outside the cab work correctly and blink when the signal switch is activated.

Required Parts

Table 1
Required Parts    
Item     Qty     Part Number     Description    
1     1     327-8515     Signal Lamp Gp (LH)    
2     1     327-6125     327-6125 Signal Lamp Gp (RH)    
3     2     104-3601     Screw    
4     2     8T-4127     Screw    
5     8     9X-8256     Washer    
6     4     5C-2874     Nut    

Solution

Replace the front 339-3189 Marker Lamp Groups with 327-8515 Signal Lamp Gp (LH) and 327-6125 Signal Lamp Gp (RH). The rear signal lamp groups do not need to be replaced.

Mounting Hardware




Illustration 1g03719218

(G) 104-3601 Screw (M5)

(H) 8T-4127 Screw (M5)

  1. Remove 339-3189 Marker Lamp Groups , nuts, and screws from the front light posts.

  1. Install the 327-8515 Signal Lamp Gp (LH) and 327-6125 Signal Lamp Gp (RH) with new nuts and screws.

Note: 104-3601 Screw (G) is 5 mm (0.2 inch) longer than 8T-4127 Screw (H)

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