PARKING BRAKE HORN RELAY (SERIAL NUMBERS 319995 THRU 342573)

TM 5-2420-222-20-1

INDICATOR AND WARNING ELECTRICAL CIRCUITS - CONTINUED

Number 1 terminal connected by wire to negative terminal of parking brake switch and positive terminal of parking

brake warning light.

Number 2 terminal connected by wire to electric horn positive terminal.

Number 4 terminal connected by wire to ground.

Number 5 terminal connected by wire to starter switch positive terminal.

Normally closed relay solenoid is held open by voltage from negative side of closed neutral safety switch. If range

shift lever is placed in gear, neutral safety switch opens and relay solenoid is no longer energized, allowing relay to

close. If parking brake lever is-engaged, parking brake switch is closed and voltage flows through switch and relay

to sound electric horn.

Warns operator that parking brake is engaged when range shift lever is in gear.

TIME TOTAL METER

Positive terminal connected by wire to ignition lock switch IGN terminal.

Negative terminal connected by wire to ground.

Operates whenever ignition lock switch is on to show total number of hours engine has run.

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