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78 D-150 No headlights. #1303073 09/12/12 08:01 PM 09/12/12 08:01 PM
Joined: Mar 2008 Posts: 293 salem, oregon. usa E elmor OP enthusiast
elmor OP enthusiast E Joined: Mar 2008 Posts: 293 salem, oregon. usa	Truck has been sitting for several years. The brake lights and turn signals work. I replaced the dimmer switch, fuses, pulled the bulkhead connections apart, pulled the plug off the headlight switch. I can hear the breaker click in the fuse box when I pull the headlight switch on. I have checked grounds and all seem to be in place and making good connections. I'm thinking it's about time for a cold one and a little Captain Morgan's on the rocks. It won't fix the headlight problem, but it might adjust my attitude.

Re: 78 D-150 No headlights. [Re: elmor] #1303074 09/12/12 09:20 PM 09/12/12 09:20 PM
Joined: Jun 2005 Posts: 5,110 Western Md. skicker "The Champ"
skicker "The Champ" Joined: Jun 2005 Posts: 5,110 Western Md.	Check the wiring around the high beam indicator button on the floor, and make sure its plugged in all the way. ...FAFO...

Re: 78 D-150 No headlights. [Re: skicker] #1303075 09/12/12 11:06 PM 09/12/12 11:06 PM
Joined: Jan 2003 Posts: 6,022 Morningside AdventurerSport waaaay out there in left field
AdventurerSport waaaay out there in left field Joined: Jan 2003 Posts: 6,022 Morningside	Quote: Check the wiring around the high beam indicator button on the floor, and make sure its plugged in all the way. I agree, that'll do it (cause them to NOT work) good luck! Otherwise, wiring issue somewhere, ground, relay, etc. JS 76 Dodge Adventurer Sport Power Wagon W100 318, 727, NP203 Fulltime 4x4 Russet Red 06 Jeep Commander Ltd 4x4, 5.7L Hemi, QuadraDrive II 06 Chrysler 300C AWD 5.7L Hemi 10 Mopar 10 Challenger R/T, #483/500, 5.7L HEMI 10 Jeep Grand Cherokee Ltd 4x4 5.7L HEMI 11 Dodge Ram 1500 LoneStar Quad Cab, 5.7L HEMI, Fulltime 4x4, Deep Cherry Red 16 Jeep Cherokee Limited 3.2L Pentastar V6, 9 Speed Torqueflite, 4x4, Black

Re: 78 D-150 No headlights. [Re: elmor] #1303076 09/13/12 09:37 AM 09/13/12 09:37 AM
Joined: Jan 2003 Posts: 21,079 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,079 Niles , Ohio	If the relay is clicking you have a short somewhere.Do the tail lights come on when you turn on just the park lights?Try taking the connectors off the headlight bulbs.Ive seen the bulbs go bad and short inside.If it still kicks out the HL relay there is a short in the wiring.Un bolt the hi beam switch from the floor and see if it kicks out.Ive also seen the wiring to it ground on the floor.Rocky Chrysler Firepower

Re: 78 D-150 No headlights. [Re: therocks] #1303077 09/14/12 04:53 PM 09/14/12 04:53 PM
Joined: Jan 2003 Posts: 2,931 P Paul_Fancsali master
Paul_Fancsali master P Joined: Jan 2003 Posts: 2,931	here is a ground wire right next top the battery make suer its still there and not corroded off That was all my headlight problem on my 100 pickup

Re: 78 D-150 No headlights. [Re: Paul_Fancsali] #1303078 09/14/12 05:19 PM 09/14/12 05:19 PM
Joined: Jan 2003 Posts: 21,079 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,079 Niles , Ohio	A missing ground will either have the lights dim or not working.It wont make the HL relay kick out.Something in the curcuit is shorted to kick it outRocky Chrysler Firepower

Re: 78 D-150 No headlights. [Re: therocks] #1303079 09/14/12 07:31 PM 09/14/12 07:31 PM
Joined: Jul 2007 Posts: 1,682 Philadelphia R radar top fuel
radar top fuel R Joined: Jul 2007 Posts: 1,682 Philadelphia	My 87 d150 had a bunch of intermittent electrical problems that ended up being caused by the bulkhead connector needing cleaning /tightening- the one through the firewall.

Re: 78 D-150 No headlights. [Re: therocks] #1303080 09/14/12 08:50 PM 09/14/12 08:50 PM
Joined: Nov 2004 Posts: 9,312 SoCal 68HemiB master
68HemiB master Joined: Nov 2004 Posts: 9,312 SoCal	Quote: Un bolt the hi beam switch from the floor and see if it kicks out.Ive also seen the wiring to it ground on the floor.Rocky ^ this Look very closely at the floor switch, the connector, and the wires in that same area for a dead short to ground. Decades of living down in the mud and dirt that is a pickup's floor, AND getting stomped on and kicked at is not a kind environment. Down to just a blue car now.

Re: 78 D-150 No headlights. [Re: 68HemiB] #1303081 09/16/12 05:50 PM 09/16/12 05:50 PM
Joined: Mar 2008 Posts: 293 salem, oregon. usa E elmor OP enthusiast
elmor OP enthusiast E Joined: Mar 2008 Posts: 293 salem, oregon. usa	Okay, I played with the dimmer switch connections and now have headlights. Still don't have tail lights or parking lights. Turn signals, hazards and brake lights work just fine. What am I missing here?

Re: 78 D-150 No headlights. [Re: elmor] #1303082 09/16/12 06:00 PM 09/16/12 06:00 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	tail lights and parking lights are the same small filament in the 1157 bulbs. This circuit originates in the headlight switch. Could pull the connector off of the headlight switch & jump fire to the correct female terminal in the connector & see if they light up. If not go downstream to the next connector & check it for fire (might be behind the drivers kick panel). keep working your way rearward & checking each connector for the open live every 24 hour block of time like it's your last day on earth

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