t5 to c4 swap know car want start

What about the neutral safety switch under the car that attached to the T-5? You'll need to bypass that connection also; I don't know if they make a connector to the C4.

LB

theres 2 plugs under the dash on your clutch pedal for the clutch safety switch, a gray one and a brown one, the brown plug is the one you want to jump not the gray.

my 84 the only plug near the tranny on the harness was the backup switch plug. when i fried the original trannyin the 89 i put the 84's in there and only had 1 switch and that was the backup switch for the reverse lights. forget which years are different.

The T5 has a neutral safety switch and back up light switch on the drivers side, should be a 4 wire setup. You need to jump it or use a C4 switch.

The C4, stock also has a neutral safety switch and backup switch, its a flat, plastic switch that fits over the shift lever, and bolts on with two bolts. The holes are slotted for adjustment. If you have that, just connect teh wires.

Here's a checklist:

Since some of the tests will bypass the safety interlocks, make sure that the car is in neutral
and the parking brake is set. Becoming a pancake isn’t part of the repair process…

Check battery, terminal connections, ground, starter relay switch (also known as solenoid) and
starter in that order. Battery cables with the replacement ends that clamp on the cable with 2 bolts
are a know problem source.

A voltmeter is handy if you are familiar with how to use it to find bad connections. Measure the
voltage drop across a connection: more than .5 volts across a connection indicates a problem.

See http://www.fluke.com/application_notes/automotive/circuit.asp?AGID=1&SID=103
for help


1.) Will the car start if it is jumped? Then clean battery terminals and check battery.

2.) Check the battery to engine block ground, and the ground behind the engine to the firewall.

3.) Jump the big terminals on the starter relay next to the battery with a screwdriver - watch out
for the sparks! If the engine cranks, the starter and power wiring is good. The starter relay is also
known as a starter solenoid.

4.) Then pull the small push on connector (red wire) off the starter relay (Looks like it is stuck on a
screw). Then jump between the screw and the terminal that is connected to the battery. If it starts,
the relay is good and your problem is in the rest of the circuit.

5.) Remember to check the ignition switch, neutral safety switch on auto trans and the clutch
safety switch on manual trans cars. If they are good, then you have wiring problems.

Typical start circuit...

Diagram courtesy of Tmoss and Stang&2birds.


See http://www.autozone.com/images/cds/gif/large/0900823d80195963.gif for 88-90
year cars .OR see http://www.autozone.com/images/cds/gif/large/0900823d80195964.gif
for 91-93 year cars. See http://www.autozone.com/servlet/UiB..._us/0900823d/80/1d/db/3c/0900823d801ddb3c.jsp for 94-95
model cars.

6.) The starter may be hung, loosen up the bolts that hold it on, and give it a good whack with a
big hammer. Tighten up the bolts and try again.

7.) If that doesn't work, use a jumper cable from the positive lead on the battery direct to the
starter post where the big wire from the relay connects. If it cranks then, it is the power wire from
the relay gone bad. This will be hard to do, since there isn't much room to do it.

8.) Pull the starter and take it to Autozone or Pep Boys and have them test it. Starter fails test,
then replace it. If you got this far, the starter is probably bad.