project "GoNDown"

[RPM Graphics]

not as steady as i would like. as soon as they guy finishes paying me for my motor i'll be set. i couldn't get my headers today so i'll go tomorrow morning. then off to pick up a few paint supplies, then to my friends shop to see what we can get done on my intake. i hate not being able to take advantage of this beautiful weather.

[RPM Graphics]

Black Velvet ceramic coat



cleaned up the frame a little with some Por-15

[kevhill85]

Nice truck..

[RPM Graphics]

now to the most dreaded part, WIRING!!!!! i understand the new harness to the motor & ECU. what i'm having problems with is figuring out what to keep on my truck harness & where to tie in for the speedo, tach, oil pressure, & temp. i'm trying to remove all the engine side from my harness & just have the body side left, if that makes sense. there's 2 plugs on the firewall, main bulkhead on the driver side & i'm guessing the one on the passenger side is for the heat & a/c? if anyone has a diagram for these plugs that would be great, or if someone has done this swap in a 96-98 & are running only the LS ECU please get with me. i'd like to talk to someone on the phone so i can figure out what i'm missing here.

[RPM Graphics]

yea me!!!!! i found the pin out for the main firewall plug, C100 connector. should make things go a little easier.




now i just need to figure out what stays & what can be removed. also still need to find out about the other plug on the passenger side which really isn't a plug, it's a weather tight grommet.


some of the ones in the pin out above don't match my plug.
i also found this one but it's missing some of row D & all of row E. some of those match on mine but some don't.

[RPM Graphics]

little info on the C100 connector diagrams.
the first one matches my 96 exact.
the second matches the 98 harness exact.
some people tell me 96-97 is the same others say 97-98 is the same, either way 96 is totally different then 98.

i went back to pull a part & bought another harness from a 96 this time. this harness should go a lot quicker.

[myzterray]

man i messed up my stock wiring harness...i gotta get another one smh..im having problems with the pns switch. i think i cut off too much stuff..i got everything i need to get it running but...i cant get it running. hey what are you doing about a/c?

[greenvortec]

yea me!!!!! i found the pin out for the main firewall plug, C100 connector. should make things go a little easier.




now i just need to figure out what stays & what can be removed. also still need to find out about the other plug on the passenger side which really isn't a plug, it's a weather tight grommet.


some of the ones in the pin out above don't match my plug.
i also found this one but it's missing some of row D & all of row E. some of those match on mine but some don't.

could you tell me which one of the wires you used for the speedometer on the dash? there is too many "vehicle speed sensor" or "VSS signal" to know which one is which.. also, what wire did you use for the OBD2 port? " i need serial data but it looks like it "tees" off into two wires, One running into the weathertight plug on the passenger side. And Does the TCC wire go to the ABS module connectors as well?

[RPM Graphics]

i used B5 on the first diagram. the first diagram is for a 96 (which i have) & the second diagram is for 98. i'm not sure which one of these is the same as 97. if you look at your c100 connector, if the E8 wire is black, then you will have the same as the 96, if it's white you have the same as 98.
i have a stand alone harness from Nelson & it has an OBD2 port on it. i did tie it back into the c100 connector, B6, so my check engine light on my dash also comes on.

not sure about the TCC wire, like i said i have a stand alone harness & i removed my ABS.