vss/speedometer/cruise. wiring idea to make it happen. need opinions.

[kewljay223]

dude, you need to calm down. your getting the answers that you need. just because they are not what your wanting to hear (i.e. using both pcms) or the fact that you just plain dont understand doesnt mean they are wrong! i told you already to just add the wires to the harness you have and your good to go. this has been answered a million times. just pay attention to what your reading!!

i shouldnt be spoon feeding your ass but i dont want to see any more new threads by you about this! so take it and figure it out.

in the obs trucks, the vss does NOT go straight to the speedo/cruise. it goes to a VSSB/DRAC box depending on year. as yours is a 95, it has the VSSSB. it deciphers the vss signal and THEN sends it to speedo/cruise. on the newer trucks, the vss goes straight to the pcm, an IT deciphers it and sends it to speedo. so your only options are to use the vssb box like i did or use the pcm and make sure its programed for your tire/gear ratio and your done for speedo!! wow. super difficult...

as for cruise, it depends if your runniing DBW or DBC. if DBW, its F***ing easy! remove old cruise module and replace with TAC, splice in 4 wires and done!! thats how i did it and it works flawlessly. if you run, DBC, afaik, you keep the old cruise box hooked up to the vssb, run your cable to the TB and it will controll it physically. simple as that.

here are two links that i have posted numerous times on this site that you can read and figure it out. if you dont know how to read a wiring diagram, thats not our problem.

this explains the drac/vssb http://www.tbichips.com/drac/ i explained a nice "how to" to get the speedo correct in my build thread which is in my sig... maybe you should take a look....

here are wiring diagrams for damn near any car you need including the cruise circuit for your year truck. http://search.ebscohost.com/login.as...ile=autorefctr

user:student
pass:uatc

stop whining and do more searching. the answers are out there. you just havnt looked hard enough. i found all this info and hooked it up in working order without asking a single question about it. as stated, there is NO NEED for both pcms. im running both but the old is SOLEY for the ABS which what i hear is not even necessary as the new pcm can controll it also.. SSSOOOO, FORGET the old pcm!!! all you need is the LS pcm and your golden!

[gagliano7]

http://www.ls1truck.com/forums/lsx-t...dometer-2.html
http://www.ls1truck.com/forums/lsx-t...-wiring-4.html post 38 has wiring diagram for drac box which on my 1992 is behind the glove box. ls pcm speed output goes to the lt blue black wire for speedometer . The trans speed output goes to the ls pcm. Look at first post for the pins it goes to if you have the 1999-2002 pcm
http://www.ls1truck.com/forums/lsx-t...-wiring-4.html
Here is the ls wiring diagrams http://lt1swap.com/wiringharness.htm

You will have to have the ls pcm programmed to get your speed correctly in the ls pcm and for the speedometer reading in your truck.

[bk_cauley]

I thank both yall for the help. I think one of the reasons I am getting so frustrated is because I HAVE been searching. for about a week straight and haven't found anything definitive. I have searched this forum non stop too. Maybe I was using the wrong terms. This is the last of the project and I am beyond ready for it to be over. I am going to try to sort this out after work. if I cant figure it out then, I will just have to deal with it.