Straight from DCS conversion manual.......
’03-‘06 starter relay wiring- Standard trans in torqshift truck
When changing transmissions in ’03-‘04’s you will have to re-wire the starter and
reverse lamp relays. You will also need to make some changes for your cruise
control and transfer case electric shift if applicable. Read the instructions
completely before doing any wiring so you will have a good understanding of what
you need to do and can do things in the proper order. Re-wire as follows:
Make sure the batteries are disconnected
Starter relay- You will need a clutch pedal position switch, and a connector for the
same. The connectors are also available new if you cannot get a used one. This
switch installs on the push rod in between the pedal and the clutch master cylinder.
With the connector cavity pointed down, snap the switch onto the push rod. If you
are going to wire in a cruise control servo, read those instructions as well, so that
you can rewire the clutch switch for that function at the same time. After you have
wired the connector, plug it in to the switch and rotate the switch clockwise to
where the connector is in the 12 O’clock position then put the lock on the bottom of
’04 trucks may have different wire colors, but they are in the same location as the ‘03’s.
The easiest place to find the wires you need to deal with is at the connector on the
(the computer by the battery on the driver’s side) that is closest to the
firewall. Unplug this connector from the computer and take off the shield on the
harness side. Where the wires go into the connector there are numbers. Find the
wire in the number 4 position. It should be brown with a pink stripe. Later trucks
are pink. Cut this wire away from the connector. The Ford computer switches this
wire to ground to enable your starter relay. To the harness end of the wire you cut,
solder or use a good butt splice connector to attach a wire long enough to go into the
cab to the clutch pedal position switch. Connect this wire to the wire in pin # 1 in
the clutch switch connector. If you are looking at the connector as it is facing you,
with the wires pointed away from you, and the alignment tab pointing up, this is the
cavity on the farthest left. Connect the wire next to it to a good ground. This will
make the clutch switch close this circuit to ground when you are pushing on the
Cruise Control- You must re-wire the following to disengage the cruise control
when the clutch pedal is pushed. The easiest way is to find the wire in pin #4 at the
servo in a convenient place to break out of the harness and go inside the cab.
Normally, in a truck that was a diesel and you were installing the gas cruise servo
you would only splice to this wire at the brake pedal switch, but you will have to cut
this wire in two. Do not cut this wire in two at the brake switch because there are
factory splices on this circuit that you will disconnect power from.
The best way - no wires to run through the firewall - is to find this wire and the
splices mentioned above in the harness going to the firewall, under the dash, and cut
the wire on the firewall end of the splices.
Either way, connect the servo side of this wire to the wire in pin # 3 of the clutch
pedal position switch. Connect the harness side of the brake wire to the wire in pin
# 4 of the clutch switch. Verify that this wire in the #4 pin on the servo connector
has power when the brake pedal is pushed, no power and grounds when both pedals
are in normal position, and no power no ground when the clutch pedal is pushed
down. This will turn off the cruise when either the brake or clutch is pushed.
Reverse lamp relay- Find the connector on the PCM
closest to the front of the
truck. Find the wire in pin # 3. It should be yellow with a light green stripe. Cut
this wire away from the PCM
connector. Splice onto the side of the wire that is in
the harness. Send this wire and another wire down to the reverse switch on your
manual trans. Ground the other wire somewhere on the fender, up by your battery
so it will stay clean.
Electric shift - Find the connector on the PCM
closest to the front of the truck
again. The wire in pin # 4 is a PCM
switched ground. To fool the four-wheel drive
module you will have to cut this wire away from the PCM
and ground the harness
side of the wire. On 05 trucks use the red/white wire in pin #3 that is in the PCM
connector that is closest to the firewall.