We reserve the right to make changes in design or add improvements without incur-
ring the obligation to make such changes in equipment previously manufactured.

PARTS-SERVICE

GRAM

SUBJECT: Reverse Activated Alarm Installation on Trucks

Equipped with Solid State Accelerator

Improper installation of a reverse activated horn or light can cause early failure of the solid state
accelerator card. The use of an auxiliary contactor will isolate the horn or light from the traction
control circuit, thus avoiding card failure due to a current overload.

Units not equipped with the solid state accelerator do not need this alteration.

The parts listed below are required for proper installation. They must be installed per Figure A.

Item

Qty

Part Number

Description

1

1

(36-48 Volt)
260576

Contactor

2

1

277935

Varistor

1

1

(72-80 Volt)
269811

Contactor

2

1

277935

Varistor

F-B-12 R1
DATE: October 20, 1980

MODEL: E20-100B

J40-60A
N30-50CA/CR

ELECTRICAL
This revision corrects
wiring of part no. 2,
reference note.

*NOTE
Attach wires to
Item 2 on terminals
number 1 and 3 only.

FIGURE A

H6030