Notice - There are less than 3 weeks left until our annual server lease is due for renewal - and we are currently at 92% of funds needed to renew.
Please donate to help keep this site running -- donate here.

Jump to content


Call for Donations - All new donations go towards our 2014-2015 operating expenses. Please consider an ANNUAL donation to help keep this site operating. Click here to Donate

Photo

Car won't start... Anyone have a relay diagram?


  • Please log in to reply
27 replies to this topic

#1 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 07, 2010 - 03:59 PM

1999 Porsche Carrera 2, 6-speed, US Yesterday I installed a new ignition switch. New switch seems to operate properly. However, when I try to start my car's dash lights do not go off and when I move key to "run" the fuel pump does not kick. When I move key to start, nothing happens and all engine lights remain on. Any ideas? Also, can someone share with me the location of the relay boxes as well as relay positions in the box. I need to see if my new switch is garbage by verifying starter relay has juice. Thanks in advance. Any advice is much appreciated.


  • 0

Pete

2002 Turbo
1999 Carrera 2


#2 Loren

Loren

    Porsche Nut

  • Admin
  • 28,459 posts
  • From:Roseville, CA
Reputation: 1,289
Outstanding

Posted March 07, 2010 - 04:30 PM

What was the symptom before you changed the ignition switch?


  • 0

Loren

RennTech.org

PCA member since 1978

My Mods in the Registry


Has someone helped you with a good solution to your question(s)? If so, give them a reputation point by clicking the rep_up.png arrow at the bottom right corner of any post.


#3 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 07, 2010 - 06:10 PM

What was the symptom before you changed the ignition switch?



Loren,

No symptoms at all. The ignition switch was not operating properly. Car still ran fine. Didn't start it yesterday before I started working on it but pulled it in the garage the night before. Anyhow, my switch now operates mechanically but no start. I reinstalled a couple times to ensure I didnt miss anything. All is plugged in... ??
  • 0

Pete

2002 Turbo
1999 Carrera 2


#4 Loren

Loren

    Porsche Nut

  • Admin
  • 28,459 posts
  • From:Roseville, CA
Reputation: 1,289
Outstanding

Posted March 07, 2010 - 07:15 PM

If it started before the bad ignition switch then either you have a blown fuse or a bad switch. Have you tried the old switch to verify.


  • 0

Loren

RennTech.org

PCA member since 1978

My Mods in the Registry


Has someone helped you with a good solution to your question(s)? If so, give them a reputation point by clicking the rep_up.png arrow at the bottom right corner of any post.


#5 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 07, 2010 - 07:20 PM

If it started before the bad ignition switch then either you have a blown fuse or a bad switch.
Have you tried the old switch to verify.



Checked the old switch by re-installing. Same symptoms. Went through and checked all my fuses. I am at a loss. I will try tomorrow to get a voltmeter on the yellow wire from ignition switch to see if relay is getting juice. Is there any other relay I can swap over to see if the relay is somehow out?
  • 0

Pete

2002 Turbo
1999 Carrera 2


#6 Loren

Loren

    Porsche Nut

  • Admin
  • 28,459 posts
  • From:Roseville, CA
Reputation: 1,289
Outstanding

Posted March 07, 2010 - 07:27 PM

The relays are all solid state these days - it would be usual. Did you check the clutch interlock switch?


  • 0

Loren

RennTech.org

PCA member since 1978

My Mods in the Registry


Has someone helped you with a good solution to your question(s)? If so, give them a reputation point by clicking the rep_up.png arrow at the bottom right corner of any post.


#7 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 07, 2010 - 07:33 PM

The relays are all solid state these days - it would be usual.
Did you check the clutch interlock switch?



Well, I hear it click in and out and all the wires are hooked up. It just seems so bizarre to me. Could a faulty new switch trip anything?
  • 0

Pete

2002 Turbo
1999 Carrera 2


#8 Loren

Loren

    Porsche Nut

  • Admin
  • 28,459 posts
  • From:Roseville, CA
Reputation: 1,289
Outstanding

Posted March 07, 2010 - 08:40 PM

Bridge the clutch switch to be sure. And, you are sure your battery is good?


  • 0

Loren

RennTech.org

PCA member since 1978

My Mods in the Registry


Has someone helped you with a good solution to your question(s)? If so, give them a reputation point by clicking the rep_up.png arrow at the bottom right corner of any post.


#9 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 07, 2010 - 08:59 PM

Bridge the clutch switch to be sure.
And, you are sure your battery is good?



I will bridge the clutch switch. Battery is 7 months old. I trickle charged and of course attempted to jump with no change. Dash lights mostly all stay on and no fuel pump or starter click. I will post back tomorrow. Thank you!
  • 0

Pete

2002 Turbo
1999 Carrera 2


#10 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 08, 2010 - 10:27 AM


Bridge the clutch switch to be sure.
And, you are sure your battery is good?



I will bridge the clutch switch. Battery is 7 months old. I trickle charged and of course attempted to jump with no change. Dash lights mostly all stay on and no fuel pump or starter click. I will post back tomorrow. Thank you!

Loren,

These are similar symptoms to what I am having. http://www.renntech....ed-advice-fast/

Edited by peckel, March 08, 2010 - 10:28 AM.

  • 0

Pete

2002 Turbo
1999 Carrera 2


#11 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 08, 2010 - 07:15 PM

On switch bypass, which wires go to which? I know yel/bro (2nd from right) has power...

Attached Thumbnails

  • clutch switch bridge.jpg
    - Zoom Active -

Edited by peckel, March 08, 2010 - 08:13 PM.

  • 0

Pete

2002 Turbo
1999 Carrera 2


#12 Loren

Loren

    Porsche Nut

  • Admin
  • 28,459 posts
  • From:Roseville, CA
Reputation: 1,289
Outstanding

Posted March 08, 2010 - 08:15 PM

On switch bypass, which wires go to which? I know yel/bro has power...

Yellow/Violet and Brown are the wires on the switch.
Connect them together to bypass the switch.
  • 0

Loren

RennTech.org

PCA member since 1978

My Mods in the Registry


Has someone helped you with a good solution to your question(s)? If so, give them a reputation point by clicking the rep_up.png arrow at the bottom right corner of any post.


#13 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 08, 2010 - 08:42 PM


On switch bypass, which wires go to which? I know yel/bro has power...

Yellow/Violet and Brown are the wires on the switch.
Connect them together to bypass the switch.

Thanks! That is what I figured. No success with the switch bypass.

I have tested all positions on the back of the ignition switch and voltage outputs seems to correlate with according key positions. Tomorrow I will see if the start lock relay is getting juice. Beyond that not sure where to go.
  • 0

Pete

2002 Turbo
1999 Carrera 2


#14 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 09, 2010 - 10:01 AM

Did I somehow trigger alarm immobilizer? Has anyone else done this whilst replacing ignition switch? Neither of my keys will start the car but when I test power on back of switch all works properly. Also, old ignition switch reinstalled does not operate either.


  • 0

Pete

2002 Turbo
1999 Carrera 2


#15 Loren

Loren

    Porsche Nut

  • Admin
  • 28,459 posts
  • From:Roseville, CA
Reputation: 1,289
Outstanding

Posted March 09, 2010 - 11:03 AM

Well, at this point you likely need to put the Durametric software, a PST2 or PIWIS tester on the car and find out what is going on.


  • 0

Loren

RennTech.org

PCA member since 1978

My Mods in the Registry


Has someone helped you with a good solution to your question(s)? If so, give them a reputation point by clicking the rep_up.png arrow at the bottom right corner of any post.


#16 Ahsai

Ahsai

    Contributing Member

  • Contributing Members
  • 1,160 posts
Reputation: 43
Excellent

Posted March 09, 2010 - 11:40 AM

1999 Porsche Carrera 2, 6-speed, US

Yesterday I installed a new ignition switch. New switch seems to operate properly. However, when I try to start my car's dash lights do not go off and when I move key to "run" the fuel pump does not kick. When I move key to start, nothing happens and all engine lights remain on. Any ideas?

Also, can someone share with me the location of the relay boxes as well as relay positions in the box. I need to see if my new switch is garbage by verifying starter relay has juice. Thanks in advance.

Any advice is much appreciated.


You can get the workshop manual for '99 996 including the wiring diagram at http://www.cannell.co.uk/Manuals.htm . It may help you diagnose the electrical problem. Good luck.
  • 0
2003 996 C2 Coupe, 997 shifter, x74, Porsche sport brake pads, FisterD exhaust, Carnewal 200-cell sport cats, 160F thermostat, Dension Gateway

#17 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 09, 2010 - 01:00 PM

Well, at this point you likely need to put the Durametric software, a PST2 or PIWIS tester on the car and find out what is going on.



I agree. I will try to find someone locally who has it or send her to the dealer. Maybe a good excuse to purchase myself.
  • 0

Pete

2002 Turbo
1999 Carrera 2


#18 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 09, 2010 - 01:03 PM

You can get the workshop manual for '99 996 including the wiring diagram at http://www.cannell.co.uk/Manuals.htm . It may help you diagnose the electrical problem. Good luck.
[/quote]

Thanks for the link.


  • 0

Pete

2002 Turbo
1999 Carrera 2


#19 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 10, 2010 - 04:55 PM

Just put a friend's Durametric on it. Initial readout was of course P1602 from having the battery disconnected. However, from that was all we got. We tried to clear the codes and the module failed to initialize. We also attempted to connect to ECU for identification but to no avail. Has anyone had this occur on their own cars? What did you have to do? Any advice from here is appreciated but looks like only option is for the tow truck to the stealership.


Edited by peckel, March 10, 2010 - 09:38 PM.

  • 0

Pete

2002 Turbo
1999 Carrera 2


#20 peckel

peckel

    Contributing Member

  • Contributing Members
  • 49 posts
  • From:Alpharetta, GA
Reputation: 0
Neutral

Posted March 17, 2010 - 07:14 AM

I have been told the car needs a new ignition signal converter... and total price at $450. This includes diagnostic, etc. and 7-10 days out...


  • 0

Pete

2002 Turbo
1999 Carrera 2





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users


The RennTech.org site is Member supported!   Make an ANNUAL donation to RennTech.org    Make an ANNUAL donation to RennTech.org