electrical problems

[ram150]

My 1986 D-150 has developed electrical problems, including no dash lights, no running lights, no working gauges. no tail lights,so I replaced the headlight switch.No help. I ran a voltage test on the fuse for the gauges & the tester read .45 volts instead of the expected 12 volts. Please help if you can. Thanks to bear & all who helped with my oil sending problem P.S. (I found manual this afternoon)

 

[Prospect]

is your voltage regulator on the alternator or on the firewall?

 

[Prospect]

And...did you check the ground wire for the headlamps? If it's not grounded right, or loose, it could cause some of the problems you're experiencing.

 

[bear]

It's an 86 so it should be on his firewall .

is your voltage regulator on the alternator or on the firewall?

 

[bear]

Prospect's right . Check your grounds . Especially were you were just up at the back of the motor doing your oil sending unit . There should be a body to block ground there as well .

 

[bear]

Have you checked to see if your getting voltage into your switch ?

 

[ram150]

elect. prob

It's an 86 so it should be on his firewall .

The headlights work,but no inside lights or running lights. I ran a test on the headlight switch ground & no help. also front turn signals work , both flash in rear, No brake lights unless right turn signal is on when pedal is pressed, front hazards only. All this is a new happening as I have been driving this truck for over 16 years. Ignition has been changed (1 yr ago)& uses firewall mounted voltage stepdown to 6 volt (summit racing "orange box" Chrysler system , but that shouldn't affect lights now" Eternal vigilance is the price of freedom"

 

[ram150]

need to recheck. Don't know why the test to the hot side of gauge only shows .45 volts instead of 12 I am going out now Clean the through firewall 50 way connector with elect cleaner. the wires should go straight to fuse box.also I have replaced the turn signal harness( $70.00 +) & ran aux grounds @ all 4 turn/running lights. (grounded to inner fenders in front & to the inside of bed (behind the turn signal housing). JHB

 

[Prospector]

Sure sounds like a ground problem, Have you checked the brake light switch as well?? Just throwing it out there...

 

[ram150]

I was told that brake light switch is reverse ground.,and I have no power there . I only have headlights now, no lights of any kind. no wipers no radio & no lighter (Radio went out 1st.) thanks JHB "(Eternal vigilance is the price of freedom)"