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3800sc transmission range gear selector switch by johnguzman1212
Started on: 02-20-2015 04:04 PM
Replies: 6 (207 views)
Last post by: johnguzman1212 on 02-25-2015 06:36 AM
johnguzman1212
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Report this Post02-20-2015 04:04 PM Click Here to See the Profile for johnguzman1212Click Here to Email johnguzman1212Send a Private Message to johnguzman1212Edit/Delete MessageReply w/QuoteDirect Link to This Post
ok im doing a 3800SC swap from a 97 Riviera with 4t65e -hd trans into my 87 fiero base coupe. I downloaded the files for the wire pinout harness thing and im wiring up my harness. on my range selector switch I have a 7 pin plug and I can wire all that up no problem...but it has a 4 plug also to the left of it what do I do with that?
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Lou6t4gto
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Report this Post02-20-2015 07:01 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
I " believe" that is the neutral safety switch. That has to be wired in also. (unless you wire it like it's a "Stick", they didn't come as "stick" so I don't even know IF you can.
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Report this Post02-20-2015 07:24 PM Click Here to See the Profile for FIEROFLYERSend a Private Message to FIEROFLYEREdit/Delete MessageReply w/QuoteDirect Link to This Post
The seven pin should be neutral start and reverse lights switch the four pin is to tell the PCM which gear you have selected and the four wires go to the PCM. Should be a white, grey, yellow and black with white. Also remember to make sure the black wire from the seven pin plug is grounded as it works with the four pin one

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johnguzman1212
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Report this Post02-22-2015 06:05 PM Click Here to See the Profile for johnguzman1212Click Here to Email johnguzman1212Send a Private Message to johnguzman1212Edit/Delete MessageReply w/QuoteDirect Link to This Post
yelp those are the colors I just don't see where on the pcm they go ill recheck the pin out from the the file I downloaded hmmm I wonder if I can splice from it and and an led on my dash to show the gear im in? has anyone down this ? Im really thankful for the response.
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phonedawgz
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Report this Post02-22-2015 08:56 PM Click Here to See the Profile for phonedawgzClick Here to visit phonedawgz's HomePageClick Here to Email phonedawgzSend a Private Message to phonedawgzEdit/Delete MessageReply w/QuoteDirect Link to This Post
Only the four from the 4 pin plug go to the PCM. The large wires on the 7 pin are the starter switch neutral lock out. Black on the 7 pin goes to ground. The remaining two are the reverse light switch. Follow the directions on http://gmtuners.com to see which each of these wires go.
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cmechmann
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Report this Post02-23-2015 07:42 PM Click Here to See the Profile for cmechmannClick Here to Email cmechmannSend a Private Message to cmechmannEdit/Delete MessageReply w/QuoteDirect Link to This Post
Sometimes, wiring diagrams list those as transmission parity switch. Diagram may show 3 wires as 1 is select/switch ground. Also if not working PCM will give an error code.
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johnguzman1212
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Report this Post02-25-2015 06:36 AM Click Here to See the Profile for johnguzman1212Click Here to Email johnguzman1212Send a Private Message to johnguzman1212Edit/Delete MessageReply w/QuoteDirect Link to This Post
ive looked I cant find where the 4 small wires go to my pcm I got the pinout file from gm tuners I don't see what pin it is...am I overlooking something?
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