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> Upgrade your headlight relay to electronic, How to wire up the new relay
Mike Bellis
post Feb 16 2010, 10:42 PM
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The factory highbeam relay is a mechanical toggle relay. As they get old, they stop working correctly. It takes multiple pulls on the colum switch to engage the highbeams. Some may stop working completely.

Below you will see how to wire up an electronic relay. It's very easy to do. The very smart European builders have standardized their relay terminals. So many manufaturers relays will work. The picture below is a Saab relay. This relay can be found for $5-10 at junk yards. The 914 relay is about $50

Attached Image

Attached Image

You will need to jumper terminals 30 and 86 together with the 914 wire from terminal 30

Terminal 56a will go to the 914 Yellow headlamp wire

Terminal 56b will go to the 914 White headlamp wire

Terminal S will go to the 914 wire from Terminal S

The final wire will be a new Ground wire you will add to terminal 31

That's it! You will now have an electronic highbeam relay. Now you have to figure out how to mount it.
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kg6dxn   Upgrade your headlight relay to electronic   Feb 16 2010, 10:42 PM
SirAndy   :thumbsup: I've been thinking about doing that...   Feb 16 2010, 10:50 PM
pbanders   Very cool, thanks! BTW, most OEM headlight rel...   Feb 17 2010, 12:26 PM
kg6dxn   Very cool, thanks! BTW, most OEM headlight re...   Feb 17 2010, 11:04 PM
76-914   Good info. Could this be added to our classic thre...   Feb 17 2010, 11:28 PM
kg6dxn   Good info. Could this be added to our classic thr...   Feb 17 2010, 11:30 PM
SirAndy   I'll be able to look it up later when I need ...   Feb 18 2010, 06:16 PM
76-914   I'll be able to look it up later when I need...   Feb 19 2010, 09:18 AM
stephenaki   I just may have to do this as I think meine relay ...   Feb 18 2010, 08:31 AM
jim_hoyland   Is the original high / low relay square ? Can...   Feb 18 2010, 01:00 PM
Krank   If this circut is just used for the dimmer circut ...   Feb 18 2010, 05:19 PM
kg6dxn   If this circut is just used for the dimmer circut...   Feb 18 2010, 07:35 PM
tracks914   Or you could just drive it on sunny days!...   Feb 18 2010, 08:36 PM
jim_hoyland   Where is the replacement unit mounted ?   Feb 19 2010, 10:14 AM
kg6dxn   Where is the replacement unit mounted ? You wil...   Feb 19 2010, 05:41 PM
9146986   This is good stuff Mike!   Feb 19 2010, 05:30 PM
siverson   So this Saab relay is just used to replace the swi...   Aug 4 2013, 10:56 AM
kg6dxn   So this Saab relay is just used to replace the sw...   Aug 4 2013, 11:56 AM
Cap'n Krusty   Nice. FYI, the "builders" aren't re...   Aug 4 2013, 04:51 PM
siverson   Thanks. I got this working yesterday. Saab relay f...   Aug 5 2013, 04:56 PM
siverson   914   Aug 5 2013, 04:57 PM
porsche913b_sp   great thread and so convenant since I am tracking ...   Sep 21 2015, 10:48 PM


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