The ignition switch relay runs fuses 4-13 plus the horn relay. This would be: Wipers, AC, blinkers, tach, rear-view mirrors, cruise, ventilation fan, dash and glovbox lighting, windows, sunroof, heated seats, interior lights, back-up lights, cigarette lighter.

This sounds very similar to your list. The ignition switch relay is energized off of terminal +54 on the ignition switch, but only in the run position. This removes all of this extraneous electrical load during cranking to maximize amperage available to the starter. This is why the mechanic called it a Load Reduction Relay, although I have never heard it referred to as this. Maybe he also didn't want you to just go out and buy one yourself considering it is less than a 30 second job to change it.

Looking down at your main fusebox from the top, standing next to the drivers side fender, the ignition relay is the relay closets to you at the far left. Located in slot E and listed as component #21. If you pull it out it should have 4 terminals: 30, 85, 86, 87. (They should be labelled on the bottom or side of the relay)

Take a multimeter and check for constant +12 volts where pin 30 would sit. Check for continuity to ground at terminal 13. Throw a jumper between 30 and 87 and all of your electrical stuff should come to life. The final test is to check for +12 volts at terminal 86 when the key is in the run position. If all of these check out then the relay is bad. If you do not get +12 volts at terminal 86 when the key is in the run position, the problem is likely a fried ignition switch. Also check for some resistance bewteen pins 85 and 86 on the relay. You should read the resistance of the solenoid windings.

posted by 68.1.17...

• Alternator replaced now a bunch of stuff not working, Daniel S, Tue, 18 Jun 2002 13:24:32
  • Re: Alternator replaced now a bunch of stuff not working, MS, Tue, 18 Jun 2002 14:20:36
    • Re: Alternator replaced now a bunch of stuff not workin, Daniel S, Tue, 18 Jun 2002 14:35:33
      • No help with the other stuff, but for brake lights..., Scott, Tue, 18 Jun 2002 14:42:03
        • Re: No help with the other stuff, but for brake lights., Daniel S, Tue, 18 Jun 2002 16:18:10
          • Re: No help with the other stuff, but for brake lights., Carl, Tue, 18 Jun 2002 22:02:02 <-- Viewing This Message
            • Excellent post!, MS, Wed, 19 Jun 2002 04:19:49
              • Re: Excellent post!, Daniel S, Wed, 19 Jun 2002 12:32:34
                • Re: Excellent post!, Daniel S, Sat, 22 Jun 2002 14:01:03
                  • Re: Excellent post!, Daniel S, Sat, 22 Jun 2002 16:43:41

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

• Prev by Date: Thanks, but...., Dave M, Tue, 18 Jun 2002 21:42:45
• Next by Date: Re: Window switches - Driver side different?, Carl, Tue, 18 Jun 2002 22:07:25
• Main C900 Bulletin Board

StateOfNine.com

SaabClub.com

Jak Stoll Performance

M Car Covers

Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)