GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1998 🢒 Isuzu MD Steel Tilt (F Model) 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Headlamps, Daytime Running Lamps (DRL) On with Engine Not Running

Step

Action

Value(s)

Yes

No

1

Remove the DRL ON Relay.

Do the DRL/headlamps disengage when the engine is not running?

--

Go to Step 3

Go to Step 2

2
  1. Repair the short to ground in CKT 741 (BLK/DK GRN) between the DRL ON relay and the DRL OFF relay.
  2. Install the DRL ON relay.

Is the repair complete?

--

System OK

--

3
  1. Repair the short to ground in CKT 729, 730 (RED/BLK) between the DRL ON relay and the DRL Indicator Lamp Diode or the DRL Series Dropping Resistor.
  2. Install the DRL ON relay.

Does the DRL/headlamps disengage when the engine is not running?

--

System OK

Go to Step 4

4

Remove the Lighting Relay.

Do the DRL/headlamps disengage when the engine is not running?

--

Go to Step 6

Go to Step 5

5
  1. Repair the short to ground in CKT 715 (RED/YEL) between the Lighting Relay and the DRL Series Dropping Resistor.
  2. Install the Lighting Relay.

Is the repair complete?

--

System OK

--

6
  1. Repair the short to ground in CKT 691, 697 (RED/BLK) between the Lighting Relay and the headlamps.
  2. Install the Lighting relay.

Does the DRL/headlamps disengage when the engine is not running?

--

System OK

--