Need Help with autolamp - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 08-14-2006
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Need Help with autolamp

I posted on the regular forum but haven't got any responses - don't know if was posting on wrong forum but is there anyone out there who can help me test if my auto lamp is defective or if it's the circuit? I followed the instructions as per the posted auto lamp install.
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Old 08-14-2006
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What year is your Ranger and which mirror did you use?

Last edited by V8 Level II; 08-14-2006 at 10:32 PM.
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  #3  
Old 08-14-2006
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I've got a 99 Expedition. I got the auto lamp off my 99 Explorer which I traded in. My auto lamp doesn't have the on/off switch, just the slider.
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Old 08-14-2006
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Ok, I looked at your profile and your other post.

Quote:
Originally Posted by ppereira
I followed the guide on the auto lamp install posted here . Checked the wiring going into the mirror using a multimeter to identify the green/yellow should be 12V hot all the time; the red/yellow (not red/white) is hot in run. The other wires on the mirror are white/purple (instead of white/pink), black/pink and black. How do I test the mirror unit to check that it's not defective? Also, should the white/purple wire be "hot all the time" too? I believe the relay connection is correct because the lights turn on/off when I use the switch. I'd appreciate any help on this!!
Your profile says that you have a 99 Expedition. As far as I know, this how-to has only been done on Rangers using the 95~2001 Explorer Autolamp/Autodim mirror . The color codes in the how-to are for Rangers and may or may not match those of an Expedition.

The concept is fairly simple. Two relays are used to bypass the Main Light Switch. One handles the headlights and the other does the parking/exterior lights. The hot for both relay coils is supplied by the brown/white P/L wire. The ground for both is supplied by the white/purple from the mirror when conditions are right for autolamp operation.

Other mirror connections:

RD/YE: Keyed 12v to the mirror.
LG/YE: Constant 12v to the mirror.
BK: Ground for the mirror.
PK/BK: Reverse sense that turns off Autodim when in reverse.
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Old 08-14-2006
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Does that mean that the white/purple should not have any voltage running through it when it is either "hot in run" or "hot all the time" ? - Because if that's the case I might have the connection at the relay wrong.
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Old 08-14-2006
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Quote:
Originally Posted by ppereira
Does that mean that the white/purple should not have any voltage running through it when it is either "hot in run" or "hot all the time" ? - Because if that's the case I might have the connection at the relay wrong.
The mirror supplies ground via the white/purple to the relay coils when the Autolamps are commanded on. The mirror opens the circuit to command the Autolamps off - then you would see battery voltage on the white/purple coming from the brown/white through the relay coil.
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Old 08-14-2006
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Got another question. Would it make a difference if I connected it in a "W" ( \|/ ) instead of a "Y" connection?
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Old 08-14-2006
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It shouldn't make any difference as long as you are connecting the same three wires.
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Old 08-14-2006
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Hmmm....so what you're saying is that when I have it turned on, the white/purple should not show any voltage across it but should when the vehicle is off?
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Old 08-14-2006
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When the mirror is commanding Autolamps on, the voltage on the WH/PU should be very close to 0 with respect to chassis ground.

At any other time, the WH/PU should show around 12v with respect to ground.
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  #11  
Old 08-14-2006
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Sounds like my connections at the relays are wrong - wierd thing is I had the exact same colors as described in the install post, so I hooked it up that way.
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Old 08-14-2006
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If I had the schematics for the Expedition, I could probably give you some more help.
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Old 08-15-2006
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why is half the original question yellow?
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Old 08-15-2006
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Quote:
Originally Posted by KARPE
why is half the original question yellow?
It shows up well on the "xtreme style" forum layout but is all but invisible using the "Light style". I had to highlight it just to make it readable.
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Old 08-15-2006
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same here, lol.
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  #16  
Old 08-15-2006
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Thanks for the help!
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  #17  
Old 08-19-2006
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Where does 86 connect to??

Okay, I'm at the point of almost giving up on this. The only problem I'm having is where (from the relay) to connect 86 to? What should the voltage be? The voltage at 85 is showing greater than zero. I noticed that if 86 wasn't connected to anything, it showed the same voltage as 85.
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Old 08-19-2006
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Quote:
Originally Posted by ppereira
Okay, I'm at the point of almost giving up on this. The only problem I'm having is where (from the relay) to connect 86 to? What should the voltage be? The voltage at 85 is showing greater than zero. I noticed that if 86 wasn't connected to anything, it showed the same voltage as 85.
The ~12v to pin 86 of both relays comes from the hot wire to the parking lamp switch within the headlight switch. The Ranger color code is tan/white. The tan/white also has a third connection to pin 30 of the autolamps parking lamp relay as shown here:

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Old 08-19-2006
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This is different from that post of the diagram for the 2004 that was in color. looks like a SPDT relay was used and both the 86 were connected together but not to the 30? It was suggested to use the radio harness on that...??
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  #20  
Old 08-19-2006
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Also, I did what you suggested about connecting 86 to 30 and the light on the autolamp didn't come on but the headlight started going on and off. You can hear the relay switching between on and off. Also, the parking lights were off the whole time. Could my relays be faulty?
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Old 08-20-2006
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Quote:
Originally Posted by ppereira
Also, I did what you suggested about connecting 86 to 30 and the light on the autolamp didn't come on but the headlight started going on and off. You can hear the relay switching between on and off. Also, the parking lights were off the whole time. Could my relays be faulty?
Possible but I would guess that the Ranger autolamp mod is not compatible with your Expedition as written.
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Old 08-20-2006
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Quote:
Originally Posted by ppereira
This is different from that post of the diagram for the 2004 that was in color. looks like a SPDT relay was used and both the 86 were connected together but not to the 30? It was suggested to use the radio harness on that...??
The original mod was written for 2003-back Rangers that switch the hot side of the headlights and the hot side of the parking lights. This is the one with the B&W diagram.

The 2004 Ranger uses a different system that switches the hot side of the headlights and the ground side of the parking lights. It also has different color codes. It is the one with the color diagram.

Your Expedition may be similar to one of the two Ranger versions or it may have a third type of circuit. I don't know because I don't have a schematic for your truck.
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  #23  
Old 08-22-2006
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How do I post the schematics? - It says I may not post attachments
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Old 08-22-2006
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PM sent.
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  #25  
Old 08-22-2006
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Quote:
Originally Posted by ppereira
How do I post the schematics? - It says I may not post attachments
I sent you a Personal Message. You can email the Expedition schematic to me.
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