? On a prndl switch
Thread Starter
On The Tree
Joined: Dec 2014
Posts: 103
Likes: 3
? On a prndl switch Hello I'm getting a psi wire harness har1014 and I talked to psi and I asked if the wire harness had the wires for the prndl switch and they said no and I don't need the switch I'm using a 4l65e 04 ish transmission. And it's dbw
Do I need the prndl switch for the transmission to work right?
I have a b&m shifter that has a neutral safety switch on it .
Do I need the prndl switch for the transmission to work right?
I have a b&m shifter that has a neutral safety switch on it .
TECH Enthusiast
Joined: Sep 2016
Posts: 518
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From: North Jersey
I have a compushift 1 and when you put the trans in gear it tells the controller what gear its in.
I'm assuming your Talking about the black box on the driver side .
You do need it if you want to run the neutral safety and rev lights off of it tho
I'm assuming your Talking about the black box on the driver side .
You do need it if you want to run the neutral safety and rev lights off of it tho
Thread Starter
On The Tree
Joined: Dec 2014
Posts: 103
Likes: 3
My b&m shifter has the light switch and safety switch.
So I know in turning the motor it has charts for in gear and in park .
So what has every one done on a stand alone harness for the tune if you are not using that switch ? Since it sounds like they delete it for the stand alone
Thank you Kelly
Moderator
Joined: Aug 2010
Posts: 7,323
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From: Ann Arbor, MI
As mentioned, the "black box" only implements the Park/Neutral safety switch and controls the Reverse lights. Nothing else - IT DOES NOT tell the PCM what gear the shifter is in. The 4L60E internally determines if the shifter is in [D1], [D2], [D3] or [OD] and tells the PCM through the trans wiring harness.
BTW - I also have the B&M shifter and no "black box".
BTW - I also have the B&M shifter and no "black box".
