For the truck end don't focus on the wire colors. Instead focus on the blade positions.
On the picture refer to the left side picture. This is what you see when behind the truck looking into the outlet.
Take a pencil or pen and a pad of paper. Write down the word Truck and then a vertical line of numbers 1-7
Truck
1
2
3
4
5
6
7
Using blade 1 as a ground verify which blades on the truck do what. For example, Turn on the ignition and probe blade 1 to blade 4. If you get 12 volts on blade 4 write the word Battery next to the number 4 on the list.
Put on the left turn signal. When measuring pin 5 you should get a varying voltage. If it's not pin 5 then find the pin that has the variable voltage. Now write the word Left on the corresponding position on the piece of paper. Write the word Ground next to position 1 on the paper. Once you check all the blades to pin 1 (the ground) you should have something like below.
Truck
1 Ground
2 Brakes (have someone move the manual brake lever on the control unit).
3 Tail
4 Batt
5 Left
6 Right
7 Reverse (almost never hooked up)
Disconnect the trailer battery positive wire. Plug the trailer umbilical into the truck. With a helper in the truck go in the trailer and disconnect the two single wires that you hooked to the junction box.
Make another list called Junction Box, only this time you're recording the wire color and corresponding function.
The big bundle of whites is your ground. Assume it's number one. Have your helper turn on the ignition and find the pair of wires that have 12 volt. Write down the wire color and the function on the second list. Assuming it's one of the pairs of red wires write down on line 2 "Battery, Red, small pair". Remember don't use my list, your first list tells you what line to write into on the second list.
Check each color wire pair in the junction box and write down the color and function on the corresponding line based on your first list.
For the three single wires, use your meter to tell you what they do.
1 Ground
2 Blue, brakes
3 Brown, tail
4 Red, large pair, battery
5 Yellow, left turn
6 Green, right turn
7 Yellow, reverse
Single White (possible ground, try using it as a ground for the meter)
Single Green (??)Does it have power? Dies anything happen if you give it power?
Single Yellow (Reverse)
Other pair of reds (??)
Once you have a list it should be easier to fire everything back up. Give us the two lists if you need help.
On the picture refer to the left side picture. This is what you see when behind the truck looking into the outlet.
Take a pencil or pen and a pad of paper. Write down the word Truck and then a vertical line of numbers 1-7
Truck
1
2
3
4
5
6
7
Using blade 1 as a ground verify which blades on the truck do what. For example, Turn on the ignition and probe blade 1 to blade 4. If you get 12 volts on blade 4 write the word Battery next to the number 4 on the list.
Put on the left turn signal. When measuring pin 5 you should get a varying voltage. If it's not pin 5 then find the pin that has the variable voltage. Now write the word Left on the corresponding position on the piece of paper. Write the word Ground next to position 1 on the paper. Once you check all the blades to pin 1 (the ground) you should have something like below.
Truck
1 Ground
2 Brakes (have someone move the manual brake lever on the control unit).
3 Tail
4 Batt
5 Left
6 Right
7 Reverse (almost never hooked up)
Disconnect the trailer battery positive wire. Plug the trailer umbilical into the truck. With a helper in the truck go in the trailer and disconnect the two single wires that you hooked to the junction box.
Make another list called Junction Box, only this time you're recording the wire color and corresponding function.
The big bundle of whites is your ground. Assume it's number one. Have your helper turn on the ignition and find the pair of wires that have 12 volt. Write down the wire color and the function on the second list. Assuming it's one of the pairs of red wires write down on line 2 "Battery, Red, small pair". Remember don't use my list, your first list tells you what line to write into on the second list.
Check each color wire pair in the junction box and write down the color and function on the corresponding line based on your first list.
For the three single wires, use your meter to tell you what they do.
1 Ground
2 Blue, brakes
3 Brown, tail
4 Red, large pair, battery
5 Yellow, left turn
6 Green, right turn
7 Yellow, reverse
Single White (possible ground, try using it as a ground for the meter)
Single Green (??)Does it have power? Dies anything happen if you give it power?
Single Yellow (Reverse)
Other pair of reds (??)
Once you have a list it should be easier to fire everything back up. Give us the two lists if you need help.
