HELP! Dash Lights Out

[enyego]

My Dash Lights (Gauges, Radio Display, Heat Knobs) Won't come on with the lights. Has anyone else had this problem and found the short? No, I don't have the knob slid down.

 

[checkedout]

Instrumentation and Warning Systems


Ranger, Explorer

The instrument cluster (10849) and panel lighting are powered through the headlamp switch (11654) and pulse width module. The instrument cluster illumination is controlled by the output of the pulse width module.

The instrument cluster and panel lighting circuit provides illumination to:

l Heater control (18549)

l Instrument cluster

l Instrument panel ash receptacle (04810)

l Radio chassis.

 

[enyego]

Thanks Pete, I guess I'll start by checking the headlamp switch (11654)

 

[checkedout]

this might help.

Condition(s):
o Control Illumination Inoperative

Possible Source(s):
§ Fuse 10.
§ Headlamp switch.
§ Circuit wiring.

Action(s) to take:
§ GO to «Pinpoint Test A».
A1 CHECK FUSE


l Check fuse 7 10A located in the I/P fuse panel.

l Is the fuse OK?

Yes
GO to «A4».

No
GO to «A2».

A4 CHECK POWER SUPPLY TO HEADLAMP SWITCH


l Key OFF.

l Reconnect fuse 7.

l Disconnect the headlamp switch connector located on the instrument cluster.

l Measure the voltage on the "T/W" wire at the headlamp switch connector.

l Is the voltage greater than 10 volts?

Yes
GO to «A5».

No
SERVICE the "T/W" wire.
A6 CHECK POWER SUPPLY TO PULSE WIDTH MODULE


l Key OFF.

l Reconnect the headlamp switch connector and fuse 7.

l Disconnect the pulse width module connector.

l Headlamp switch in the parking lamp position.

l Measure the voltage on the "T/O" wire at the pulse width module connector.

l Is the voltage greater than 10 volts?

Yes
GO to «A7».

No
SERVICE the "T/O" wire.


A7 CHECK PULSE WIDTH MODULE


l Key OFF.

l Reconnect the pulse width module connector.

l Headlamp switch in PARK or HEAD.

l Probe "LB/R" and "R/BK" wires.

l Is the voltage greater than 12 volts?

Yes
System OK.

No
REPLACE the pulse width module.

 

[enyego]

checkedout
great help. i'll post tomorrow to say how it worked out.

 

[checkedout]

If you need any more of those pinpoint test let me know. I stopped there cuz I thought you would have it fixed at that point. Also those are for a 96 but the wire colors are prolly the same.