Guardian Technologies 4760 Section, Diagnostic Tests, Part, AUTO-OFF-MANUAL Switch Test Points

SECTION 4.4

DIAGNOSTIC TESTS

PART 4

DC CONTROL

PROCEDURE:

Disconnect all wires from switch terminals, to prevent interaction. Then, use a volt-ohm-milliammeter (VOM) to test for continuity across switch terminals as shown in the following chart. Reconnect all wires and verify correct positions when finished.

TERMINALS	SWITCH POSITION	READING
2 and 3	AUTO	CONTINUITY
	MANUAL	INFINITY
	OFF	INFINITY
2 and 1	AUTO	INFINITY
	MANUAL	CONTINUITY
	OFF	INFINITY
5 and 6	AUTO	CONTINUITY
	MANUAL	INFINITY
	OFF	INFINITY
5 and 4	AUTO	INFINITY
	MANUAL	CONTINUITY
	OFF	INFINITY

RESULTS:

1.Replace AUTO-OFF-MANUAL switch, if defective.

2.For Problem 8 Only: If the switch passes the tests, verify the REMOTE NOT AUTO dipswitch is set to OFF on the circuit board (see Figure 3, page 4.1-2) then proceed to Test 44.

3.For Problem 9 Only: If the switch passes the tests, proceed to Test 60.

Figure 2. AUTO-OFF-MANUAL Switch Test Points

TEST 44- CHECK WIRE 15/15A/17/239 VOLTAGE

DISCUSSION:

The circuit board will not turn on unless battery voltage is available to the board via wire 15, the AUTO-OFF-MANUAL switch and Wire 15A. If battery voltage is not available, automatic or manual operation will not be possible.

Battery voltage is available to wire 17 from pin location 11 of the J1 connector on the circuit board. When the AUTO-OFF-MANUAL switch is in the MANUAL position, wire 239 supplies battery voltage to pin location 9 of the circuit board, and engine cranking occurs.

PROCEDURE:

(For Problem 1 flow chart, do Steps 1-5 and Step 9 only)

(For Problem 2 flow chart, do all steps)

1.Set a VOM to measure DC voltage.

2.Connect the positive (+) test lead to the AUTO-OFF- MANUAL switch Terminal 2, Wire 15. Connect the negative (-) test lead to a clean frame ground. Battery voltage should be measured (See Figure. 2).

3.Connect the positive (+) test lead to the AUTO-OFF- MANUAL switch terminal 1, Wire 15A. Connect the negative (-) test lead to a clean frame ground. Set the AUTO-OFF-MANUAL switch to MANUAL. Battery voltage should be measured.

4.Connect the positive (+) test lead to Pin location 12 Wire 15 at the J1 connector on the circuit board. Connect the negative (-) test lead to a clean frame ground. Battery voltage should be measured.

5.Connect the positive (+) test lead to pin location 10, wire 15A at the J1 connector on the circuit board. Connect the negative test lead to a clean frame ground. Set the AUTO-OFF-MANUAL switch to the MANUAL position. Battery voltage should be measured. Repeat Step 5. This time set the AUTO-OFF-MANUAL switch to AUTO. Battery voltage should be measured.

6.Connect the positive (+) test lead to pin location 9, wire 239 at the J1 connector on the circuit board. Connect the negative (-) test lead to a clean frame ground. Set the AUTO-OFF-MANUAL switch to the MANUAL position. Battery voltage should be measured. If battery voltage is measured, stop and proceed to results. If battery voltage is NOT measured, proceed to Step 7.

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