[Main 95 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Polarity... Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Larry West [Email] (#1140) [Profile/Gallery] (more from Larry West) on Wed, 14 Mar 2018 08:32:04 In Reply to: Re: taillight bulbs replaced with LEDs -> errors, SWEDECAR [Profile/Gallery] , Mon, 12 Mar 2018 10:20:16 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

Incandescent bulbs don't care about polarity, or where the current enters, and where it leaves.

LEDs, on the other hand, only work with current flowing in one direction. One side of the LED must see the +12v (hot), the other must see ground.

For bayonet bulbs, polarity is fixed. Hot and ground are always in the same place.

For wedge bulbs, you need to get the polarity of the LED replacement right. If the LED does not turn on when installed & activated, remove it, turn the base 180 degrees, and reinsert.

Had to do this on my 2002 9-5 for the City (globe) lights, and license plate lights. They all work perfectly.

_______________________________________
Current:
2002 9-5 Aero Kombi Cosmic Blue
2000 9-5 SE sedan, Imola Red
1990 900S Rose Quartz, Auto
Past:
1999 9-5 LPT Combi
1999 9-5 LPT sedan
2002 9-5 Arc
1990 900 5-speed
1986 900 turbo Convertible
1991 9000 turbo
1980 99 GLi
1986 900 turbo
1986 900 S
1991 900 turbo
1984 900 turbo
1976 99 GL

• taillight bulbs replaced with LEDs -> errors, Bruce A, Mon, 12 Mar 2018 09:52:51
  • Welcome to the world of LED bulbs!, Larry West , Wed, 14 Mar 2018 08:41:101
  • Canbus communications, Bruce A., Tue, 13 Mar 2018 13:32:51
    • Re: Canbus communications, bobc , Tue, 13 Mar 2018 20:26:50
  • Re: taillight bulbs replaced with LEDs -> errors, bobc , Mon, 12 Mar 2018 18:16:41
    • Exactly correct, Stephen Goldberger, Tue, 13 Mar 2018 08:41:31
  • Re: taillight bulbs replaced with LEDs -> errors, SWEDECAR , Mon, 12 Mar 2018 10:20:16
    • Polarity..., Larry West , Wed, 14 Mar 2018 08:32:04 <-- Viewing This Message

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: Re: press clutch hard to start - which switch to replace?, Boris Bubbanov, Wed, 14 Mar 2018 07:50:09
• Next by Date: Welcome to the world of LED bulbs!, Larry West, Wed, 14 Mar 2018 08:41:10
• Main 9⁵ 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)