Mechanics

99 WIRING DIAGRAM

1999 Dodge Ram

Electrical problem
1999 Dodge Ram V8 Four Wheel Drive Automatic 14400 miles

I am looking for a wiring diagram for the wiring going in to the headlight switch. The factory fog lights do not work. The fuse and relay are good so I want to test coming out of the switch too see if it is the switch. The bulbs are good.
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Mattgoodson
January 1, 2009.



Hello –

To better assist you please let me know if your vehicle is a 1500, 2500 etc. Also is it a pickup, van or wagon, and last the engine size in liter and the 8th digit of your VIN.

Thanks for the donation

Please let us know if what the final fix was for your car so we can better assist others. Thanks!

Find a car repair manual for your car repair questions.

ImpalaSS
Jan 1, 2009.
1500 sport 5.9 L gas engine and the letter is a Z

Tiny
Mattgoodson
Jan 1, 2009.
Hello –

Do you have daylight running lamps

Thanks for the donation

Please let us know if what the final fix was for your car so we can better assist others. Thanks!

Find a car repair manual for your car repair questions.

ImpalaSS
Jan 1, 2009.
That I do not know how would I find out. I have no lights that stay on however I have found out one of the problems with the lights is a broken ground wire. When I put that back together the fog lights come on and stay on no matter what I do. Any clues I am comletly baffled?

Tiny
Mattgoodson
Jan 1, 2009.
Hello –

Please provide your VIN number to me….maybe I can check that way on the DRLs

When you say the fog light come on and stay on…….you mean with the key off and out, lights off………you walk away from the truck and they just stay on until the battery is dead?

Also, your answer did not come back to me…..I am not sure if you reposted or not. I just happened to see it open again. When you reply to me please make sure you use the Reply to Post at the bottom, then provide your answer, that way I won’t loose you in the mix


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You have a great New Year!!

Thanks for the donation

Please let us know if what the final fix was for your car so we can better assist others. Thanks!

Find a car repair manual for your car repair questions.

ImpalaSS
Jan 1, 2009.
Key off and in my pocket, switch off, and door locked they stayed on for thirty minutes till I went out and pulled the ground wire apart again. The full VIN is 3B7HF12Z9XG177090. I am very thankful for and ideas you can suggest. All I can think of is maybe the swith is bad?

Tiny
Mattgoodson
Jan 1, 2009.
Hello –

Wow – key off and in pocket…..not good.

Okay………I have attached the wiring diagram as you requested. I had to do it several parts so you could see it. So you will probably have to print and tape together. You will have to do this with a few....I have overlapped for ease of putting together.

I know you said the relay is good…I would still swap it with another like one to see if that made a difference…..you may already have though.

I am giving you the diagram for headlamp without DRLs.

Also, you said you ground the wire and the lights came on…..I have attached info on the lamps and it says it is grounded either by a wire or by the socket……so you might check to ensure the socket is properly in place, not corroded etc just in case it is grounded through it also. The problem with fog lamps is they are low and pick up rocks and trash and can be knocked around.

I have attached some other info for you……I hope this helps……

It may be the switch……….as you said.

Thank you very much for the donation

Please let us know if what the final fix was for your car so we can better assist others. Thanks!

Find a car repair manual for your car repair questions.

Interior Lighting
Notes

The courtesy lights are controlled by the CTM. The door switches are inputs to the CTM and the courtesy lights are outputs. The glove box lamp and the ash receiver lamp (if equipped) are not controlled by the CTM, They are hardwired to individual switches and fuses. The ignition key halo lamp is controlled by the CTM and will remain ON for thirty seconds after the door is closed.

The highline CTM also provides for illuminated entry option. If the CTM detects an unlock signal from the RKE transmitter, a door disarm switch input or the door jamb switch input, the interior courtesy lights will be turned ON. The illuminated entry function is canceled if the CTM senses and ignition "ON" condition or the "lock" command from a valid key fob.

If a door is left open or the dome lamp switch is left in the "ON" position for more than fifteen minutes , the CTM will extinguish the lamps to avoid discharging the battery. If the lamps are turned ON by rotation of the headlamp panel dimmer switch, the CTM will not be able to turn them OFF.

Headlamp Switch


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ImpalaSS
Jan 2, 2009.
I went through all I could find on the truck and could not fin anything wrong so I just did the easy thing and wired in a whole new switch.

Tiny
Mattgoodson
Jan 3, 2009.
Hello –

So you replaced the headlamp switch……. And now all is well?

Thank you very much for the donation

Please let us know if what the final fix was for your car so we can better assist others. Thanks!

Find a car repair manual for your car repair questions.

ImpalaSS
Jan 3, 2009.
I have the same issue with my 99 dodge ram 1500. The constant 12vdc is at the fog lamp so I followed the gnd back to the switch. I think my switch is bad but wanted to prove this. The switch works pin 5 to 6 for headlights and pin 9 to 10 for cab illumination. But pin 7 (out) for the fog lamps what pin is the input or gnd for this? I saw 2 input gnds pin 5 and 9 but always read open on the meter.

Tiny
Dkorstad
Dec 18, 2011.
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