#1  
Old 05-01-2021, 09:55 PM
Lemans64's Avatar
Lemans64 Lemans64 is offline
Ultimate Warrior
 
Join Date: Nov 2006
Location: Vancouver Island BC Canada
Posts: 1,629
Default Interesting Electrical day.

Found myself a universal hazard switch for my 64 Lemans, been sitting around for more than a few year. So during these weird times, I figured I would put it in. Also replace turn signal switch with a new on. Not wanting to cut up the wires I made up a plug in harness using old turn signal connector and another dash harness plug.
Flashers work good, until you step on the brake pedal with the flashers on. The starter engages, WTF.
Turn flasher off and no problem. tried numerous different times and same thing, tried different signal lever position, same thing. unplug power going to flasher and starter work normal. pull out flasher with power still unplugged and normal operation of starter. This does have a really that operates the starter, so suspect I have feedback somewhere with poor ground. Might just have to scrap the hazard switch. LOL. Something really weird going on. All signals work properly. Loosing hair on this one, LOL.

__________________
64 Lemans hardtop
4spd, buckets
  #2  
Old 05-01-2021, 11:00 PM
Chris65LeMans's Avatar
Chris65LeMans Chris65LeMans is offline
Ultimate Warrior
 
Join Date: May 2013
Location: Los Angeles, CA
Posts: 1,497
Default

Wow - that is a weird one.

__________________
1965 Pontiac LeMans. 440 CI, M21, 3.73 in a 12 bolt.
  #3  
Old 05-01-2021, 11:43 PM
Lemans64's Avatar
Lemans64 Lemans64 is offline
Ultimate Warrior
 
Join Date: Nov 2006
Location: Vancouver Island BC Canada
Posts: 1,629
Default

LOL, YUP. Gonna try a few different things tomorrow to try and isolate issue, not sure if relay that i have for starter is
getting powered up or getting bad ground feedback.

__________________
64 Lemans hardtop
4spd, buckets
  #4  
Old 05-02-2021, 05:51 AM
johnta1's Avatar
johnta1 johnta1 is offline
Ultimate Warrior
 
Join Date: Feb 2001
Location: now sunny Florida!
Posts: 19,893
Default

Where is the power for the flasher coming from?

I'd check the neutral safety switch wiring, and see if it has power before the switch? Maybe applying the brakes is making the neutral switch connection?
(or brake light switch connector is swapped with the neutral switch)

Disconnect the neutral switch connector and see if it still does it?

I'd say it's under the dash somewhere.


__________________
John Wallace - johnta1
Pontiac Power RULES !!!
www.wallaceracing.com

Winner of Top Class at Pontiac Nationals, 2004 Cordova
Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats

KRE's MR-1 THE Quickest, Fastest, BEST Aftermarket Pontiac Block Bar NONE!

1st 5 second Pontiac block ever!


"Every man has a right to his own opinion, but no man has a right to be wrong in his facts."

  #5  
Old 05-02-2021, 08:49 AM
LATECH's Avatar
LATECH LATECH is offline
Chief Ponti-yacker
 
Join Date: Mar 2011
Location: Indoors
Posts: 585
Default

JohnTa might be on to something. The reverse light and starter switch pigtails are BOTH right next to all the wiring for the turns at the base of the column. You have one crossed up somewhere.

  #6  
Old 05-02-2021, 08:50 AM
LATECH's Avatar
LATECH LATECH is offline
Chief Ponti-yacker
 
Join Date: Mar 2011
Location: Indoors
Posts: 585
Default

Quote:
Originally Posted by LATECH View Post
JohnTa might be on to something. The reverse light and starter switch pigtails are BOTH right next to all the wiring for the turns at the base of the column. You have one crossed up somewhere.
Check the purple wires

  #7  
Old 05-02-2021, 10:37 AM
Lemans64's Avatar
Lemans64 Lemans64 is offline
Ultimate Warrior
 
Join Date: Nov 2006
Location: Vancouver Island BC Canada
Posts: 1,629
Default

It's a 4spd car, has jumper pin on neutral safety connector, assuming that it is factory jumper.
The flasher unit gets power from the fuse box, moved the power wire to another terminal and same thing.
did not touch brake switch wire during this. So brake light still work properly. Will pull neutral safety jumper today to see
if that makes any difference. Thinking the power from flasher is feeding into brake light switch and when stepping on
pedal, the switch sends power back into the harness. But not sure why its getting to the purple start wire.
This car had no crank issues a few years back so I put in a relay on the purple wire at the horn really junction block.
Purple start wire signals the relay. Have not had a problem till I put in this hazard flasher.

__________________
64 Lemans hardtop
4spd, buckets
  #8  
Old 05-02-2021, 03:09 PM
Lemans64's Avatar
Lemans64 Lemans64 is offline
Ultimate Warrior
 
Join Date: Nov 2006
Location: Vancouver Island BC Canada
Posts: 1,629
Default

Removed the neutral safety jumper wire and it does not do this anymore, so power is feeding back thru brake lamp switch
into ignition switch and must be somehow connected to start terminal when ignition is in of pos. weird. spare ignition does not show any connection between the 2.
Out of car though. So somehow getting power to purple start wire. Interesting. If ignition is in on position it works ok. does not crank when stepping on brake pedal.

__________________
64 Lemans hardtop
4spd, buckets
  #9  
Old 05-02-2021, 07:43 PM
Lemans64's Avatar
Lemans64 Lemans64 is offline
Ultimate Warrior
 
Join Date: Nov 2006
Location: Vancouver Island BC Canada
Posts: 1,629
Default

had a diode for my msd box so installed that in the correct direction to stop feedback from the hazard flasher,
all good. now. so just for further buyers or installers of old stuff, be careful. installed on the feed wire for brake lamps
going into the turn signal switch. so no feedback can come the other way and power up the brake light switch backwards.

Rick

__________________
64 Lemans hardtop
4spd, buckets
  #10  
Old 05-02-2021, 08:57 PM
johnta1's Avatar
johnta1 johnta1 is offline
Ultimate Warrior
 
Join Date: Feb 2001
Location: now sunny Florida!
Posts: 19,893
Default

Might check the grounds under the dash. (and all grounds)
There has been cases of the brake pedal/brackets providing a ground because the dash used it instead of going through it's ground.
(least resistance)



__________________
John Wallace - johnta1
Pontiac Power RULES !!!
www.wallaceracing.com

Winner of Top Class at Pontiac Nationals, 2004 Cordova
Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats

KRE's MR-1 THE Quickest, Fastest, BEST Aftermarket Pontiac Block Bar NONE!

1st 5 second Pontiac block ever!


"Every man has a right to his own opinion, but no man has a right to be wrong in his facts."

  #11  
Old 05-02-2021, 09:47 PM
Lemans64's Avatar
Lemans64 Lemans64 is offline
Ultimate Warrior
 
Join Date: Nov 2006
Location: Vancouver Island BC Canada
Posts: 1,629
Default

was definitely a power problem feeding back into switch. But beyond the switch was my concern of it running the starter.
But all good now. Thanks for any and all comments. oh ya it has multiple grounds on the dash. did this about 12 years ago when I had it in pieces.

Rick

__________________
64 Lemans hardtop
4spd, buckets
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:15 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 

Cold Case Radiators

Cold Case Radiators is a Max Performance company that produces high end aluminum performance radiators at a price point that won't break the bank. Polished and stamped tanks. 2 rows of 1" tubes. Lifetime Warranty.

GTOG8TA.com

GTOG8TA.com is a Max Performance company that manufacturers parts for the 04-06 GTO, 08-09 G8, and 93-02 Firebird/Trans Am platforms.

Copyright © 2017