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#1 |
Registered User
Join Date: Jun 2015
Location: Northeast Missouri
Posts: 71
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Neutral Safety Switch And Manual Tranmission
I am rewiring my 71 K20 with 4 spd manual trans. I know where the neutral safety switch connects to the steering column, but I don't see how that switch is relevant with a manual transmission.
Do I need the neutral safety switch with a manual trans? If I do, where does it connect? |
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#2 |
Registered User
Join Date: Dec 2007
Location: Santa Maria, Ca.
Posts: 1,423
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Re: Neutral Safety Switch And Manual Tranmission
Install a switch on the clutch so it will have to be depressed to start like the newer cars
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69 Chevy 4x4 383 Power ![]() |
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#3 |
Registered User
![]() Join Date: Jul 2007
Location: New River Arizona
Posts: 1,180
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Re: Neutral Safety Switch And Manual Tranmission
You can make a bracket under the dash and use a brake light switch to interrupt the starter wire. you can lengthen the factory purple wires and connect them to the new switch. It is very easy and will save damage if someone forgets to press the clutch when it is parked close to something.
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#4 |
Registered User
Join Date: Sep 2003
Location: Boise ID
Posts: 609
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Re: Neutral Safety Switch And Manual Tranmission
My truck at one time was a manual transmission. I converted it to a automatic several years ago and never had a neutral safety switch. Now I am installing a B & M floor shifter with a micro switch in the shifter. So what wires do I use to wire up a neutral safety switch
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"72" Red CORVETTE 4-speed 350 "70" Chevy Short Bed early stages of resto. Edel 600 cfm carb Weiand Stealth Intake HEI shorty Headers 4/2 Drop 295 50R 15 TOYO on 10 inch wide corvette rally rims at all 4 corners. "CHEVY RULES" ![]() |
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#5 |
Senior Member
![]() Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,538
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Re: Neutral Safety Switch And Manual Tranmission
That switch you are referring to is a combination switch for the neutral safety and backup lights. The neutral safety part was only used on automatics.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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#6 |
Registered User
Join Date: Jun 2013
Location: West Virginia
Posts: 6,427
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Re: Neutral Safety Switch And Manual Tranmission
So a "neutral safety switch" makes it so the clutch has to be pressed down to start the engine?
I realize this is a safety feature but is it something that's really needed? Is it needed to work with more modern engines and transmissions? |
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#7 |
Registered User
Join Date: Sep 2003
Location: Boise ID
Posts: 609
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Re: Neutral Safety Switch And Manual Tranmission
OK so what I'm asking is my new shifter comes with 2 micro switches. One for backup lights (and for that I need to dig out the connector that was on my old 4-speed) light green wire. And the neutral safety switch I'm assuming I need to make a cut in my purple ignition wire and wire the other micro switch on the shifter in line with the purple wire.
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"72" Red CORVETTE 4-speed 350 "70" Chevy Short Bed early stages of resto. Edel 600 cfm carb Weiand Stealth Intake HEI shorty Headers 4/2 Drop 295 50R 15 TOYO on 10 inch wide corvette rally rims at all 4 corners. "CHEVY RULES" ![]() |
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#8 |
Registered User
![]() Join Date: Mar 2014
Location: Toano, VA
Posts: 896
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Re: Neutral Safety Switch And Manual Tranmission
I agree with the clutch switch. Much easier than putting a button on every gear. NAPA sells these switches cheap, they are threaded so they can be mounted to a bracket with a nut.
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"Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809 |
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#9 |
Custom Sport W/T
Join Date: Nov 2010
Location: Tarpon Springs,Fl & Annapolis,Md. ....................Quaint drinking villages with a fishing problem
Posts: 898
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Re: Neutral Safety Switch And Manual Tranmission
We made it for most of the last 113 years without a neutral safety switch on most manual shift vehicles. Backup lights maybe but no neutral safety switch. Forgetting to push the clutch in will likely only happen once, a lot like forgetting to take it out of first gear on the early hand crank vehicles.
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#10 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,664
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Re: Neutral Safety Switch And Manual Tranmission
Thankfully the car makers figured out how to include one on standard shift vehicles. There have been too many serious injuries and deaths due to someone twisting the key with it in gear. My neighbor was jump starting one of his cars. He was standing between the cars when his daughter turned the key. He was pinned between the cars and received both legs broken.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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#11 |
One of the First
![]() Join Date: Jan 2000
Location: St. Augustine,FL.
Posts: 4,060
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Re: Neutral Safety Switch And Manual Tranmission
ACDelco GM Original Equipment-D1532F / Back Up Light Switch - Mounts on SM465 STD trans - back-up lights. No neutral safety for a stock 1971 GM standard shifter or steering column. Automatics had them on the steering column, wouldn't start unless in park.
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DAVID PASSMORE ST AUGUSTINE ,FL ZIP 32084 '71 SWB K/10 CUSTOM DELUXE (Chili) '72 BLAZER K/5 Muscle Truck (Mule) '72 LWB K/20 CHEYENNE (Blackie) |
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#12 |
"something witty here"
Join Date: Apr 2009
Location: Salmo, B.C, Canada
Posts: 966
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Re: Neutral Safety Switch And Manual Tranmission
This is what I did, I just took a brake switch from another parts truck and put it in front of the clutch pedal. When the clutch is out the button is depressed and it wont start, push the pedal and it starts.
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57 chevy 4x4 70 swb fleetside 4x4 68 burb 2wd: 71 burb 2wd: 350 4spd 71 lwb fleetside 4x4: 350/sm465/205/3.07 eaton posi rear 72 lwb fleetside Cheyenne 454/th400 1991 GMC V3500 CC 4x4 |
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