View Full Version : Fog light mod
12-18-2007, 08:52 PM
I noticed there was a tech link to mod the foglight switch to run them with just the parking lamps. I also noticed it was for an older style ranger. I have a 2000 ranger and would like to do the same mod, but I don't know enough about electrical to know where to start. Can anyone help?
All i'm wanting to know is how to make my fogs run with just my parking lights on.
if it's easier to do it so they can be turned on whenever, inform me how. i'm looking for the easiest way, i'm not picky. i just would like to turn them on during the day and around dusk without having my headlights on too.
12-18-2007, 09:22 PM
This makes the fogs stay on with the brights.
First, I located the relay box. It’s mounted to the same plate that holds the bottom of the airbox. I got into it, and here’s what I found:
1. There are sockets for a total of six relays, two large (the size of a conventional Bosch relay) and four smaller relays, in a 1 2 1 2 configuration. The six sockets were arranged like this, with socket 1 being toward the front of the vehicle:
Socket 1 was empty from the factory.
2. The small type relays in sockets 2 and 3 control the foglamps. Why two relays? One to turn on the foglamps when the parking lamps go on, the second to turn off the foglamps when the high beams come on.
3. By checking the wiring on the back of the relay sockets, I came to the conclusion that relay 2 as shown above turned off the foglamps. Why? It was wired so that power flowed when the relay was _NOT_ energized.
4. The small relays, Ford part number F57B-14B192-AA, SPST relays. There are 5 pins on the relay, laid out as follows:
| | |
| | |
2 4 1
Pins 3 and 5 are .25" wide; pins 1, 2, and 4 are smaller, about .187".
The corresponding sockets are not numbered at all that I can detect.
5. Relay 2 is wired so that power flows from pin 3 to pin 4 when the relay is not energized. Only when the relay is energized is the power cut off. Power goes from pin 4 of relay 2 to the control circuit side, pin 1, of relay 3. In other words, run a jumper from the furthest away wide socket to the center narrow socket of relay 2, and the foglamps don't go off when the high beams come on.
6. To make the foglamps stay on when the high beams come on, I removed relay 2 and ran a jumper wire from pin 3 to pin 4. Just as simple as that.
7. I made a jumper from 16 ga. wire with a male spade connector on each end. For the wide connector I used 3M from Wal-Mart. For the narrow connector I used Radio Shack #64-3134. I didn't measure, but the assembled length of the whole thing was about 2" to 2.25". Jumpered pin 3 to pin 4 and it works like a charm.
12-18-2007, 10:33 PM
i never use my high beams anyway. if i do use them i usually just pull back on the switch so that my low/high/fogs are all on at the same time. my low beams with the fog does a better job most of the time then just the high beam. I'm hoping someone on here will know how to wire it so i can run with just the Parking lamps and fog lamps on. The current setup i have now (stock wiring) will only allow the fogs lamps to be on with the low beams on.
12-31-2007, 02:38 PM
I am sorry for bumping up this post but why dont you just run your fogs off of a switch so you can have them when you want them? This is probably the easiest way to do it without having to worry about splicing into the wrong wires.
02-14-2008, 04:14 PM
heres the easiet way, all you do is bend a prong..
heres the link:
02-14-2008, 04:18 PM
is there a downside to the "bend a prong" way of doing this??
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