what is a WAC relay

[chadomac]

hey on my 87 my wires to mine are fried what is it and what does it do

[Rick93coupe]

http://www.allfordmustangs.com/forums/5-0l-tech/99177-1993-ford-mustang-lx-5-0-h-o-need-replace-both-fuel-pump-relay-wac-relay.html

Refresh me on what your car is doing or not doing right now.
If you have some wiring that's fried, I think you've found your problem.

[chadomac]

got a 1987 mustang gt test drove and bought car ran fine got it home didnt drive at all as i was trying to put everything back together it sat for 5 plus years. well when the put the tailpipes
on they over tignted them and burned a whole in line that runs from tank to filter. had that line replaced well drove it one day and as i was turnning corner it died but fired right back up did it few more times got it home went in came back out 15 mins later no start just crank. well it was a high mile motor and was going to rebuild anyway so i pulled it put another motor in. it fired right up figured must have been the motor. well never drove it on the road just start pull out of garge pull back in let it run for 10 or so mins well low and behold started one day backed out of garge went to pull it back in couple hours later no start just crank. guy picked it up to look at it and finish body and paint well when he got it were it was going it fired up. ran for couple months while he had it picked it up at body shop drove it 7 miles back to his garge ran great next day wont start again. too different motors did not interchange any parts same thing.

i have did everything i know. i have replaced coil bought a new ignition switch Distributor,module,stator ecu and ecu relay and fuel pump relay . would a key and tumblerset do this? no spark and the fuel pump is not running got power to the fuelpump relay and to the ecu relay in and out but none of them click when i turn the key ive did these tests

Does coil (+) terminal have voltage IGN ON?--------yes

Does coil (-) terminal----------yes

Have you checked the TFI connector terminals for power at the TFI connector ---- yes it does

Have you checked the main and EEC grounds--------- yes all good

there is a relay on pass side that comes out of the same loom as the o2 sensors
the wires are fryed there is a pink with blue tracer a black with green tracer a red and a orange with a blue tracer any idea i am not getting any power to any of the lines with the ign on.

tryed jumping fuel pump at test point nothing any ideas