3800 swap harnesses (Page 9/20)
smartaxel NOV 30, 08:52 PM
So, how can we keep this from the trash can? It's a legit posting, with good information.. Let's not let it get ruined with bickering.

1. It serves to show those of us with more money then time where we can get a quality harness..
2. it shows those of us with more time then money how to make our own- if we choose to use Dan's routing.
3. it also shows other options- including cutting an OEM harness.

Can we agree to disagree? There are many ways to go about things..This is just one. If anyone disagrees, by all means create another post, with your pics, and explain how you do things.. This gives everyone options- but keeps each thread tightly composed, and viewable.

Personally I have a car with the "Pre-Skitime" wiring.. I have had quite a few problems so far-wires pulling apart, wires getting cut while driving etc. In my case, I work a lot, and have zero freetime to build my own harness. I would happily pay for a nice, clean, reliable harness- it just makes more sense for my situation.
josef644 NOV 30, 08:53 PM
Dan , and others following this thread, I am watching closely as I plan on doing this to a 4.9 sometime in the next 6 months. Every time you post, I and others, learn something new. Please don't get discouraged and stop your good efforts because of some child like behavior. I thank you for your good efforts.
Joe Crawford, Texas
FIEROFLYER NOV 30, 09:23 PM
If you give me the year of the 4.9 you are using I can see about getting you the wiring diagrams for it. Dan
josef644 NOV 30, 09:35 PM
Thanks, but I'M not that close yet. I have 9 grandchildren who's Christmas will come first. I can play again right after New Years Day ! But beleive me I am learning things at a fast rate.
Joe

[This message has been edited by josef644 (edited 11-30-2007).]

topcat DEC 01, 04:09 AM

quote
Originally posted by smartaxel:

So, how can we keep this from the trash can? It's a legit posting, with good information.. Let's not let it get ruined with bickering.

1. It serves to show those of us with more money then time where we can get a quality harness..
2. it shows those of us with more time then money how to make our own- if we choose to use Dan's routing.
3. it also shows other options- including cutting an OEM harness.

Can we agree to disagree? There are many ways to go about things..This is just one. If anyone disagrees, by all means create another post, with your pics, and explain how you do things.. This gives everyone options- but keeps each thread tightly composed, and viewable.

Personally I have a car with the "Pre-Skitime" wiring.. I have had quite a few problems so far-wires pulling apart, wires getting cut while driving etc. In my case, I work a lot, and have zero freetime to build my own harness. I would happily pay for a nice, clean, reliable harness- it just makes more sense for my situation.



Great response. I am in the same boat where I do not have the time to make a harness... heck, it took me over three months to complete an intercooler install, and that should be a one weekend/one day project. I will gladly pay what Dan asks for a harness, and I am very comfortable around wiring. The thing I really appreciate about this thread is the step by step picture instuctions. If I were to ever take on another conversion, I will absolutely buy a harness from him.
Khaos88GT DEC 01, 05:30 PM
O.K. maybe I missed it. I understand the c500 connector is a junction block that is part of the Fiero, but the c203 connector is that part of the original Fiero wiring too or something that is gonna come off the 3800 wiring harness? Also I noticed that you are labeling the pins A, B, C, etc per connector and stating there old and new location. Are the labeled on the connectors already or something or does everyone else have the GM wiring diagrams in front of them except me? Yeah, I know, dumb questions but I wanna have a nice solid understanding of what I doing before I start.
FIEROFLYER DEC 01, 08:26 PM
The C500 is a junction block where wires are fed to the engine and tail lights from the rest of the car. The C203 is a connector inside the console by the computer. It is where some of the wiring from the engine feeds to the rest of the car just like the C500. The letters and numbers are on the connectors if you clean the dirt and crap off them. The C203 has two halves to the connector one has A through H and the other J through R. The C500 has the letters going across one way and the numbers down that is how you get pins like A2 of E3.
So when you make your harness remove the appropriate connector and cut it away from the Fiero engine harness leaving enough wire to work with basically the more wire the better. When your harness is finished you just install it on the engine and plug the two connectors back in.
Because the 3800SC engine harness has the PCM connector on it so all that is needed is to feed the harness with the proper powers and grounds then from the harness feed the proper gauges and the harness is complete.
The main connectors from the 3800SC harness that fed the rest of that car are removed from the harness and rerouted to reach the appropriate connector on the Fiero harness.
For example the C203 connector pin C which is brown with a white stripe is the input to the gauges to work the check engine light that comes from the Fiero ECM. On the 3800SC swap harness you take the wire from the PCM for the check engine light or SES or MIL which ever the diagram calls it and reroute it to the C203 pin C and solder it to the wire you cut from that pin. Dan
oldfiero DEC 01, 08:42 PM
Dan, by chance did you have the oportunity to get the speedo ckt info?

Tks
Khaos88GT DEC 04, 04:56 AM
Thanks for the help. So pretty much if I'm gonna be deleting stuff like boost bypass sylenoid, and egr then just dont include those connections in my harness, pop on block-off plates, and get Lloyde to program my pcm?
Matthew_Fiero MAY 21, 11:04 AM
"C203 pin G this is the speed sensor high feed to the speedometer. This must be connected to the PCM C1 pin 55 through a buffer circuit on auto swaps"

and on manuals?