84 hedlights now with pics of relays June 11, 2007, 10:56:48 PM I was out working on the bird earlier. I put in the new dimmer switch and got my low beams back. So while I had it all apart I installed the relay for the auto on/off headlights. I checked the old relay and it didn't switch on and off. So the new one should make it work. I plugged it in and the parking lights came on. The car was off and the auto switch was in the off posistion. THe head lights were off also. Anytime the relay is pluged in the parkling lights are on but no headlights. Also when I do turn the auto lights switch on and cover the sensor the headlights still don't come on. Yes the catr was turned on during the last test. Does anyone have any ideas on where to start. Also does anyone have the wiring diagrams for this. I looked in my chilton and Haynes and found nothing. So if anyone can and wants to please help. Quote Selected
84 hedlights now with pics of relays Reply #1 – June 12, 2007, 05:14:31 PM I found the diagrams that I needed. When I was looking I found in there what is called a Light sens AMP. Does anyone know what this looks like or where it is located under the dash. I got those diagrams over here http://www.foxthundercats.com/tech/wiringdiagrams.htmNow just the trace everything down. I thinking that it isn't the headlight switch it is only about a year old. Yes it is the one for the auto on off lights. Quote Selected
84 hedlights now with pics of relays Reply #2 – June 13, 2007, 05:16:53 PM The 84 EVTSM says: Behind LH side of I/P. It has a flat connector (all the wires side by side). It has five wires to it. W/P H, O/W H, R/Y H, DB/O D, P/O DThe power to the Light Sensor Amplifier through fuse 18 is hot in start or run. That's the R/Y H wire. Quote Selected
84 hedlights now with pics of relays Reply #3 – June 13, 2007, 05:25:21 PM I suspect there is a hole in the dash so light can shine on the light sensor amp? Quote Selected
84 hedlights now with pics of relays Reply #4 – June 13, 2007, 06:16:51 PM Maybe it has to be in gear for them to turn on? I dont know but newer trucks with DRL have to be in gear for the lights to come on. Quote Selected
84 hedlights now with pics of relays Reply #5 – June 13, 2007, 08:18:02 PM No, my car has the same system. The lights will come on whenever it is dark and the key is on. Are you sure the second relay is good? Quote Selected
84 hedlights now with pics of relays Reply #6 – June 13, 2007, 11:59:44 PM im looking,,for those of you who got the evtm cd,, im on pages 81-87brb---------------Quote from: CougarSE;154064No, my car has the same system. The lights will come on whenever it is dark and the key is on. Are you sure the second relay is good?i see that now,, there should be two relays for the auto on/off system.In a nutshell, his problem is that nothing works except for park lamps, and according to system operation,, they are mafunctioning as well.brb again, doing some staring at some of this.-----------------------------------------------Go pull out your hazard flasher and see what happens (cause other than that second relay,, this shiznit gets to be a squirrel nest of circle jerking through these loop back patty wack give a dog a bone relay mazes.)---------------------------------------well now,, your problem does not seem to be an option in the shop manual,, back to the evtm. I think we need to focus on what could a faulty park lamp system have on auto lamps. Pull that hazard flashe first. that might make them go out and if it does, then test the system.brb again,, still looking.-----------------------------------------Does your rear lights also come on when that one relay is plugged in?how did you test the new/old relay,, sorry,, have to ask.ill assume you have tail and license plate lights on as well when this replacement relay is installed.the only way so far i can see power deliver to those circuits is through the multi funcion switch in the column or through the hazard flasher. Since either could be a problem, pull the hazard button thing out and see if that changes anything. Next pull out the hazard flasher. the multifunction sw is the path of current flow for the hazard flasher. If the flasher has damage, it could be stuck , tap on it while installed and see if that changes something also. It wouldnt be the first time a turn/hazard multi function switch went bad.ill post pics tomorrow, should be pages 81-96 which will cover all basis for auto lamps and external lamps.,,,,sorry tired now. Quote Selected
84 hedlights now with pics of relays Reply #7 – June 14, 2007, 09:07:06 AM Thanks for the help guys. I tested the realy with battery power. I just found the coil part on the relay and tested to see if it would switch on and off. The old ford realy didn't and the new one did. That is all I did for a test. The relays look the same and they have the same amount of pins. I haven't been back out there uet to test anything else. I do know that since I put the wiper delay box in the car the auto lights haven't been working. That was over a 2yrs ago. Siince then I have put in the new headlight switch. Trying to solve another problem and that wasn't it. So let it go until I had to replace the dimmer switch. I thought the relay might be toast so I bought a new one. So when I tested the relay and it didn't work I was like YES! But now this. You are right all the parking lights come on the front the rears, But no headlights. Even if I cover the sensor I get no headlights. Also the parking lights are on any time the relay is pluged in. Car on or off. The lights used to only come on if the switch on the headlight swtich was on and the car is on the posistion. It didn't matter if you are in gear or not. According to the wiring diagrams there isn't a second realy that I see. So if there is where would that be. I have been tracing out any wiring that goes to the exterior lights. Please post that info when you get the time I could really use it. Quote Selected
84 hedlights now with pics of relays Reply #8 – June 14, 2007, 09:19:02 AM When you say the Light AMP is on the left behind the I/P what does the I/p stand for? I just got up and the brain is jelly still. Quote Selected
84 hedlights now with pics of relays Reply #9 – June 14, 2007, 06:02:53 PM I/P = instrument panelI believe the light sensor amplifier is the the thing you put finger on when you were testing it. The light sensor. Quote Selected
84 hedlights now with pics of relays Reply #10 – June 14, 2007, 06:27:58 PM If the autolamp relay is energized (picked) both the parking lights and the headlights should be on. Even if everything is turned off.The relay is picked by voltage on the white with purple hash wire from the light sensor amplifier. Do you have a test light or meter you can stick on this wire?You need to find out if the relay is picked when it shouldn't be.If it is picked then someone may have messed with the red with yellow stripe wire that goes to turn on the headlights. Quote Selected
84 hedlights now with pics of relays Reply #11 – June 14, 2007, 09:38:45 PM If you don't have a test light, get one. They are cheap.Tell us what you have on each of the wires to the relay, light or no light.I see only one relay in the circuit in the 84 EVTSM. Quote Selected
84 hedlights now with pics of relays Reply #12 – June 15, 2007, 04:06:48 AM I have a DVOM. Just need to grab it form my buddy. I left it over there while working on the wiring for his fiero Converison. I haven't messed with the wiring myself as soon as I get the meter back I will test that wire. should be tomorrow. Quote Selected
84 hedlights now with pics of relays Reply #13 – June 15, 2007, 03:31:39 PM Test all the wires on the relay while you are in there. Quote Selected
84 hedlights now with pics of relays Reply #14 – June 16, 2007, 11:37:31 AM what is your addy, there are lamp circuits from pages 77-120 in this evtm. Ill send you a copy since its probably gonna take less time than what it would for my uploading on 24k dialup.did you get anywhere troubleshooting?i know the 84 is much different but wiring layout should be same colors ect except for the extras on the 86 and up.When you get around to to it,, do the steps i posted before,,,also,, i want you to look at page 89/90 where the hazard circuit branches off.also,,, we need to look at these diagrams and figure out how to jumper / bypass the photocell. I dont have time to right now but maybe i can later. someone else might be able to cypher it also.we are dealing with either a short circuit (since power is applied to the park lamps with either the key on or off)0r.......Faulty timing circuit in the photocell, with an additional issue with why the headlamps dont come on.I wonder if your missing a relay ?-------------------------------------------------------------------------------hummm,, just thought of something else,,,,,,,, for the headlamps that is.......When you pop the hood, to the left and to the right next to the hood height adjustment there is a ground wire. This should be a littel tiny wire with a little tiny lug on the flat surface of the crossmember. do you have those hooked up? Quote Selected
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