gauge wiring

[myboyhasa66]

i have a 91lx and i am putting my boost guage in and my question is where did u guys get the illumination wire. ive read on turboford that some took it off the radio but i would rather just get it off the guages. i would rather not pull the cluster so does anyone know which fuse it is so i can get the wire or what color it is so i can track it down. i have a haynes book and it says the fuse is #13 but can anyone confirm.

 

[RustBucket]

The same circuit that feeds the gauge panel lights feeds the factory radio light. You could probably grab it from the panel dimmer. Just check to make sure you're pulling it from the side of the switch that dims.

 

[Red_LX]

You could take it directly off the headlight switch....that may not be the easiest way to do it though, due to having to route the wire back under the dash and everything.

 

[myboyhasa66]

i think im gonna try and do it from the fan and a/c controls or the ash tray light. im gonna look at it today. thanks for your replies guys

 

[myboyhasa66]

02 sensor

i did it today off the radio and it works great i looked at it with a test light to make sure the guage turns off when i turn the lights off. also my air fuel guage can i hook up the signal wire an inch or two from the o2 sensor???

 

[Red_LX]

You talkin about the 12V signal wire? I don't know, I took my 12V signal off one side of the coil.

 

[myboyhasa66]

for the o2 guage there is one illumination wire, a ground wire, a 12v wire, and a signal wire from the o2 sensor. im trying to find what color the signal wire is on an 87 tc o2. thanks for your help guys i really appreciate it. -marcin

 

[Red_LX]

Ohhh the O2 sender wire...couldn't tell ya.

 

[myboyhasa66]

lol thanks anyway red. anyone else

 

[myboyhasa66]

hey garrett i noticed you didnt have an air/fuel guage in your tc. any particular reason

 

[Dr_EluSivE]

hey garrett i noticed you didnt have an air/fuel guage in your tc. any particular reason

i debated putting one in mine, (i did install one) Aside from telling you whether its in open or closed loop mode, the guage doesnt really do much, it jumps around so much you cant make a good judgement of the mixture, and they are calibrated for a N/A car anyway. Basically if the lights bounce around, then your system is working properly. Thats about all it tells you.

Dr.

 

[myboyhasa66]

yeah i guess but im guesing if its really lean it will say so. thats all i want. soooo anyone know about the wire i need to go into. there are three wires going into the sensor how should i figure out which one it is. the hayes manual sucks cack and my evtm is coming next week.-marcin

 

[Dr_EluSivE]

the Signal is wired to Pin 29 on the LA series computers, I would make the connection near the computer, and not outside in the engine bay. The more connections you have out there the more chance of corrosion and shorts you have. I just spiced into pin 29, and got my power and ground from behind the radio.

Dr.

 

[myboyhasa66]

okay im gonna try it tomorrow. thanks for the help guys.-marcin

 

[myboyhasa66]

i looked at my comp and i noticed that i dont have a pin 29. does anyone know which pin is the signal pin to the o2 sensor in an la3

 

[myboyhasa66]

i may be wrong i think i was looking at it upsde down. i searched the archives at turboford and found a lot of info on the pin 49 wire that stinger says to ground to the computer ground post. everyone says to ground it on the compressor. is the computer ground post not accurate will it cause it to run closed loop all the time

 

[myboyhasa66]

thanks guys i got the guage wired up. i wired into pin 29 and im gonna check it tomorrow to see if anything works. now i need to get the car started.-marcin

 

[88stangmangt]

i debated putting one in mine, (i did install one) Aside from telling you whether its in open or closed loop mode, the guage doesnt really do much, it jumps around so much you cant make a good judgement of the mixture, and they are calibrated for a N/A car anyway. Basically if the lights bounce around, then your system is working properly. Thats about all it tells you.

Dr.

exactly why im gonna use a digi wide band with my stand alone.