Printable View
i have a 04 4.8 in a 83 gmc p/u, I used the factory wiring harness and add a fuse and relay panel to it, I am trying to adapt a 02 gauge cluster to it, i have the factory manual for the 04 but none for the 02, was hoping someone could tell me what the 16 wires go to, which color to what, I have the speedometer, tach and amp gauge working, but not sure how to hook up the rest of the wires, thank you, this site has helped me a ton...
what computer/throttle system are you using?
if using a cabled throttle body and 99-02 PCM you are good to go.
if using a fly-by-wire (like in 03-07) then it wont work. the serial
data the PCM supplies is "coded" differently.
youll have turn signal indicators (2)
low washer
serial data (oil, water, optional trans temp and fuel) gauges
12volt switched
12 volt constant
ground
driver information center (4)
speedo
tach
MIL
thats all i know of...
airdeano
I am using the 04 pcm, vats removed, electric throtle body, need to know whick number and color wire goes to where thank you
I will look up the wiring diagram when I get home. I just put an '04 5.3 into my '01 silverado I just can't remember off the top of my head what all the wires go to.
On a side note: Airdeano do you know if there is any way to change the serial data output on an '04 PCM so it will read on my '01 cluster?
This is from an '02 Silverado 1500 5.3L
http://shaggypokertables.com/motorsw...terdiagram.jpg
thank you very much, will go out tomorrow and see what happens, i guess it probably willl not work since i have 04 pcm, but got cluster on ebay for .99 cents so got to at least try.
thanks for wiring details, got the speedometer,tach, volt, oil, water, check engine light all working, now just have to figure out how to make fuel guage work, thanks again for info
No problem, glad you got it working. Did you have to do anything special to get the 02 cluster gauges to work with the 04 PCM?
the things like seat belt, and warning lights were not compatable, so just took the led lights out and unpluged the message center, but just hooked the wires up like the drawing said and the important things worked. thanks again
How'd you get engine temp off of that pinout chart?Quote:
Originally Posted by oldcarstulsa
it works off the serial data, only the oil pressure has its own wire
the fuel gauge is also serial data. youll need a 250ohm sending unit
in the tank. wire the sending unit to the PCM.
airdeano
So how many ohms is the stock 2004 sending unit?
Serial data? So i can't just tap onto all my sensors and hook them up to my factory jeep electronic gauges huh....i have to get a chevy cluster? i think i'll figure out how to get signals from other sensors...maybe double up on sensors...your thoughts?
Double the sensors. That works great. I've done it twice now and I have no regrets. What's nice is I can hook HPT or any scanner to my OBDII port and double check their readings.
Can i use the chevy engine sensors...but splice into their wires...i mean...i guess i need to figure out if the chevy signal is the same as the jeep signals used to be...then use the same sensor...just steal the output signal from the sensor...Quote:
Originally Posted by RedHeartbeat
the signal goes from the sensor to the pcm, then the wire that goes to your dlc is the same serial wire to the insturment cluster
DLC??? and i'm not running a serial cluster from a chevy....Quote:
Originally Posted by oldcarstulsa
DLC = Data Link Connector
as for gauging, if you plan on using the OE JEEP cluster, youll have
to use the OE sending unit for that specific gauge. the resistance in
the sending unit is matched to that gauge. you might be lucky to
match another "style" sending unit, but thats as far as that goes.
the tach and speedo will be harder...
your JEEP cluster uses what for a speedo? cable? electronic?
your tach was a 4cyl or 6cyl OE?
you might be able to use a tach adapter to change voltage and
resolution for the genIII.
there is an oil tap at the filter/oil pan line. as for coolant the
passenger side cylinder head has a plug, but the thread adapter may not
allow the sending unit to "submerge" to sense correctly.
airdeano
So what if i replace the guages with Autometer electronic gauges...can i get them that will work with the current Chevy sensors? like a direct line hookup, (ie. from wire off of temp sensor to wire on guage)Quote:
Originally Posted by airdeano
How did yo get to the leds??Quote:
Originally Posted by oldcarstulsa
the cluster just pulls apart and exposes the leds
Did you have to remove the indicator pointers??
The back comes off of my 04 couple of clips are tricky. This exposes the rear of the board the front comes off but the LEDS are behind the face plate. I would have to remove the needles. I didn't try because i was told thats a bad thing to do, so i left them alone.
the 04 you have to take the pointer and all apart, the 02 that i have you just pull the back and all the gauge drivers and back plate just come off, so you can just unplug the leds, the 04 is a whole different beast