Printable View
I have a 89 c1500 and am trying to get my speedo and temp sender working. I ordered the 98 camaro 3 wire temp sender and pigtail, so witch wires go where? The delco plug will all be white. On my speedo I searched a lot on here but all post talk about the vss buffer behind the glove box, isn't the DRAC inside the cluster from 88-93? So any help? Thanks in advance. Jim
The DRAC is back behind the radio on those trucks, if I recall correctly...
However, your PCM is capable of generating the proper signal for your current speedometer, though you may need to get the PCM flashed to get it to send the data out as stock it goes through the GMLAN connection to the instrument cluster.
Not sure which wire is which for the sending unit though...
I picked up my sender and plug today, the dang pigtail was 62.00!!! whats up with that? Jim
On my harness I have a wire marked VSS output, where do I hook it up? Jim
The VSS should hook to a pickup sensor on the tail shaft housing, passenger side of a 4L60e. 4L80e has two sensors on the driver side. The rear one is the speed sensor and the front one is the input shaft sensor.
BTW, the 3 wire coolant temp sensor isn't accurate for the OBS trucks. You can use it for reference but I'd rather use a factory sensor screwed into the head.
I have athe VSS hooked up on the trans but the guy who did my harness has a wire marked as such comoing out near where my pcm. Jim
There's a light blue wire coming out from the instrument cluster that you tap that wire into. On my 92 and 93 the blue wire connected to a DRAC box behind the glove box but your truck won't have one located there. The wire may be going to your original PCM. Cut it and splice into that light blue wire.
My dash wiring will be different[6.2 diesel]. I tied into the blue wire and nothing, I don't have a dash wiring diagram for the diesel. So I'm back to the start, Can anyone help with my speedometer? Jim
you have an 89 model c1500 diesel? :eek:
Yes, it was a 6.2 diesel. Jim
heres the oversimplified solution to all problems in the ...
get a 88-91 suburban inst. cluster with elec. speedometer. you cannot just snatch the speedo out becuase the PC board is different, and the housings are different. i myself have 2 and both are for sale 65+shipping. a very very simple repining of the factory inst. cluster harness and your all set. connect the VSS signal from the computer to the #18 pin of the connector, and call it done.
as far as the temp, autometer makes a probeless water temp sender, and adapter for the ls motors. it reads a tad incorrectly (15*) but whatever, im thinking of just taking the needle off, and resetting it by hand, or even trying to play with resistors.
autometer 2277 is the adapter
autometer 2259 is the probless. you dont want probe syle becuase it doesnt fit in the adapter, you would have to bore it out (becuase we did that to my friends swap), plus automtere asured me it reads the same.
anyway thats the solution to your problems and they are all cheap to get/do
clint
I need to know the pin out where #18
is on the cluster
http://www.ebay.com/itm/1989-Chevrol...b7f563&vxp=mtr
I have one of these for my 1988 and it will answer all your questions about your entire electrical system. I built my entire harness (excluding basic functions on left side of firewall) from a GTO harness and when anyone asks how I did it, the answer is always the same," One circuit at a time".
88-91 does NOT have DRAC, they have a similar module IN the cluster. The cluster NEEDS to see a 40 pulse per driveshaft revolution AC signal, that's why the VSS sensor ring has 40 teeth in an automatic transmission. Be glad you don't have to deal with A T56 and 17 tooth VSS.
Unfortunately, it's not. 88-91 goes Purple and Yellow twisted pair from VSS straight to back of speedometer cluster, 92 and later the VSS signal went to PCM or DRAC first and then to speedometer cluster. LS1 PCM will produce a signal like a DRAC, so for 92 and later it could be used to send signal to speedometer cluster.Quote:
Originally Posted by 80K25
Clear as mud?
I don't a pin 18 on mine.