window and tach - Page 2

f00g00 · 08-27-2007, 01:11 PM

Use this schematic as a guide.
http://www.cygnusx1.net/Supra/Librar...x?S=Main&P=094

Pull the master switch in the door.
Turn on key till dash lights come on or just start it.
Check the plug for 12V on pin 1 the blue wire and check for a good ground on pin 5 the White with black stripe.
Turn off key.
If no power with good ground pull the main power relay.
Turn on key and and check for 12V on pin 2 and pin 1. They should both have 12V. Pin 1 energizes the main relay when you turn on the key and start the car and stays powered till you shut off the car.Pin 2 is power from the 30A CB that feeds the switch when the relay is energized. If no power on 2 then change the CB or try and reset it. The CB either heats up and trips when too much current and resets itself when it cools down or you have to manually reset it. I havn't looked at it so I don't know which it is.
Try those steps and let us know how it goes.

f00g00 · 09-01-2007, 02:46 PM

With the main relay out you have power on pin 2 and nothing on pin 1?
That means the CB is good and the main power to the relay is not good.
Check the 7.5 Guage fuse. Thats the power to the main power relay. But if that fuse was blown most of the guages would not be working. You could pull the 7.5 guage fuse, find out which side has power and read the Other side to pin one of the main power relay pin 1 for continuity.
It sounds like there is an open wire between the Guage fuse and the main power relay.
This main power relay also goes to the power seat lumbar, does that work?

f00g00 · 08-19-2007, 08:35 PM

Quote:

Originally Posted by Supra2NR

Imma go take a look at that,
But which one and where exactly is the main power relay?

http://www.cygnusx1.net/Supra/Librar...px?S=Main&P=22
Bottom of the page has a pic of both, they are the middle two.

Supra2NR · 08-27-2007, 02:44 AM

Quote:

Originally Posted by Supra2NR

Imma go take a look at that,
But which one and where exactly is the main power relay?

ok sum update, i was doing a bunch of wiring and re-wiring my gauges earlier
so...
got the tach issue done with
jus used the black wire coming from the harness at the back of the gauge cluster

but still stuck on the stinkin window issue, dont seem to get any power on any of them,

any way i can fix this without spending anything?
and if the relays are broken how can i find out for sure?

08-27-2007, 01:11 PM	#1
f00g00 12psi boost Join Date: Aug 2005 Location: Kuwait Posts: 292	Use this schematic as a guide. http://www.cygnusx1.net/Supra/Librar...x?S=Main&P=094 Pull the master switch in the door. Turn on key till dash lights come on or just start it. Check the plug for 12V on pin 1 the blue wire and check for a good ground on pin 5 the White with black stripe. Turn off key. If no power with good ground pull the main power relay. Turn on key and and check for 12V on pin 2 and pin 1. They should both have 12V. Pin 1 energizes the main relay when you turn on the key and start the car and stays powered till you shut off the car.Pin 2 is power from the 30A CB that feeds the switch when the relay is energized. If no power on 2 then change the CB or try and reset it. The CB either heats up and trips when too much current and resets itself when it cools down or you have to manually reset it. I havn't looked at it so I don't know which it is. Try those steps and let us know how it goes.

09-01-2007, 02:46 PM	#2
f00g00 12psi boost Join Date: Aug 2005 Location: Kuwait Posts: 292	With the main relay out you have power on pin 2 and nothing on pin 1? That means the CB is good and the main power to the relay is not good. Check the 7.5 Guage fuse. Thats the power to the main power relay. But if that fuse was blown most of the guages would not be working. You could pull the 7.5 guage fuse, find out which side has power and read the Other side to pin one of the main power relay pin 1 for continuity. It sounds like there is an open wire between the Guage fuse and the main power relay. This main power relay also goes to the power seat lumbar, does that work?