Code Alarm CA-640 Instruction Manual download pdf (Page 9)

1. Basic Harness (B), cont’d.

+12 Volts

21/B

To Horn Wire

Diagram 10

20/B Positive/Negative Door Input (20 AWG) (GREEN/VIOLET)

Connect the 20/B wire to the vehicle pin switch or courtesy light circuit.

Verification - Refer to Vehicle Wire Color and Location Chart for

circuit type and location, or verify the vehicle wire using the

following guideline:

• Positive Systems - Target wire registers voltage

when any door is opened.

• Negative Systems - Target wire registers ground

when any door is opened.

Important!

After i nstallation, select the polarity of t his circuit i n programming

Option Bank 9, Feature 1 (factory default = negative), page 20

NOTE:NOTE:

FOR POSITIVE SYSTEMS, TEMPORARILY CONNECT THE 20/B WIRE TO GROUND

IN ORDER TO ACCESS THE PROGRAMMING MODE.

CHANGE OPTION BANK 9/FEATURE 1 TO POSITIVE POLARITY (PAGE 20).

21/B Horn Relay Drive 500mA (20 AWG -) (BROWN/BLACK)

Locate the vehicle horn wire.

Verification: This wire will register

either positive or ground when the

horn is pressed.

Connect the 21/B wire to the vehicle

horn wire if the system is negative.

If the system is positive, use a SPDT

Relay (not supplied) and connect the

21/B wire to the vehicle horn wire as

shown (Diagram 10).

22/B LED2 (20 AWG+)

23/B LED1 (20 AWG-)

Locate a visible section of the dash with 1" clearance behind

the location.

Drill a

" hole and snap the Status Indicator into place.

Connect the Status Indicator Red Wire to the 22/B LED2 wire.

Connect the Status Indicator Black Wire to the 23/B LED1 wire.

CA-640.p65 10/20/03, 7:47 PM9

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Code Alarm CA-640 Instruction Manual Page 9