TM-5-4210-249-13-P-2

TACTICAL FIRE FIGHTING TRUCK (TFF) MODEL M1142

TECHNICAL MANUAL; OPERATOR’S AND FIELD LEVEL MAINTENANCE MANUAL WITH REPAIR PARTS AND SPECIAL TOOLS LIST (INCLUDING DEPOT REPAIR PARTS AND SPECIAL TOOLS); PART 2 OF 4

TM-5-4210-249-13-P-2 - Page 657 of 1452

TM 5-4210-249-13&P-2

0173-27

DRAFT

0173

TFFT04725

Step 42.

Disconnect two-way radio interface wire harness connectors from two-way radio and

intercom.

With a test lead set, check for continuity across two-way radio interface wire

harness PTT Lo wire (yellow) from intercom connector terminal 4, to two-way radio

connector, terminal 7.

If there is no continuity, repair PTT Lo wire if repairable

(TM 9-2320-325-14&P), or replace two-way radio interface wire harness

(WP 0462).

Step 43.

With a test lead set, check for continuity across two-way radio interface wire harness

PTT Hi wire (orange) from intercom connector terminal 3, to two-way radio connector,

terminal 2.

If there is no continuity, repair PTT Hi wire if repairable

(TM 9-2320-325-14&P), or replace two-way radio interface wire harness

(WP 0462).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION