Sometimes
a breakout box is useful. Make your own.
Parts
list:
Box
ECU plug from car harness
ECU socket from ECU
~34 banana sockets ($4/4 at Radio Shack)
~6 banana plugs ($4/4 at RS)
various gauge wire
switch for spout
2- DB25 computer connectors, female, for the terminals
(RS kits with uninstalled terminals) ($9)
shrink tubing ($5)
spiral wire wrap ($8)
bar and gel epoxy to seal the ECU socket ($10)
I recommend
soldering every connection. And then fit some shrink tubing.
I only
soldered up the circuits actually used in the Scorpio (~34 of the 60).
The layout could be adapted to the XR, assuming it's different (I don't
know). It would all pretty much be keyed to the car that supplies the
ECU plug.
44 and
49 are optional.
Next to
36 is the switch for the spout.
I left
the inside parts of each harness loose- no tie wraps or retainers. I wasn't
able to cut the wires to exactly the right lengths, so I stuffed the excess
back in the box. This lets the wires flex when bending the harness, so
there's no strain on the big connectors.
The ECU
socket needs some support, since it's pretty fragile on its own. I used
bar epoxy to support the wires and gel epoxy to fill the open back.
ECU
pin outs
|
1-
KAPWR |
21-
ISC valve |
41- |
2- |
22-
Fuel pump relay |
42- |
3-
VSS |
23- |
43- |
4- |
24- |
44-
HEGO ground |
5- |
25-
ACT |
45-
MAP |
6- |
26-
VREF |
46-
Signal return (ECT, TPS, ACT, PFE) |
7-
ECT |
27-
PFE |
47-
TPS center |
8- |
28-
ground? |
48-
Self-test in |
9- |
29-
HEGO |
49-
jumped from 16 |
10-
Accessories (A/C) |
30-
Neutral safety switch |
50- |
11- |
31-
Canister purge solenoid |
51-
Thermactor (AMI) |
12- |
32- |
52- |
13- |
33-
EVR |
53- |
14- |
34-
Fuel computer |
54-
WOT relay |
15- |
35- |
55- |
16-
Ignition ground |
36-
Spout |
56-
PIP |
17-
Self-test out |
37-
VPWR (injectors, ISC, CANP, AMI) |
57-
VPWR (injectors, ISC, CANP, AMI) |
18- |
38- |
58-
Injectors, bank 1 |
19- |
39- |
59-
Injectors, bank 2 |
20-
Case ground |
40-
Battery ground |
60-
Battery ground |
index
|