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> 914-6 conversion wiring guidance
mb911
post Apr 14 2020, 05:36 AM
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QUOTE(raynekat @ Apr 13 2020, 06:59 PM) *

QUOTE(mb911 @ Apr 13 2020, 12:57 PM) *

Clay its a 73 engine with a fresh SEV Marchal alternator


Hope you are not using a Bosch voltage regulator with that SEV Marchal alternator. It's a mismatch big time and you'll not have enough voltage at the battery.



Nope using the SEV regulator..
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mb911
post Apr 14 2020, 05:38 AM
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One question I do have is the black wire coming from the chassis harness switched 12v from the key switch?
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IronHillRestorations
post Apr 14 2020, 06:14 AM
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Just got up so still foggy, but I'm pretty sure you are correct
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mb911
post Apr 14 2020, 10:38 AM
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Thanks Perry.. Getting the wiring wrapped up this week is my goal along with all fuel and oil connections..
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roblav1
post Apr 14 2020, 06:07 PM
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Thank you very much Clay.

QUOTE(ClayPerrine @ Apr 14 2020, 04:46 AM) *

QUOTE(roblav1 @ Apr 13 2020, 07:00 PM) *

Holy cow! Thank you. I'm at the same place as Ben, but my engine is 930/02 with a new internal alternator.


Yours is very simple. Look at the 4 cylinder relay board. there is a 3 pin connector where the /4 alternator harness plugs in. Coming from the alternator, there is a single blue wire. Hook the single blue wire to the front most pin on the 3 pin alternator connector.

Clay
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Chuck53
post Apr 26 2020, 12:07 PM
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QUOTE(mb911 @ Apr 13 2020, 03:35 PM) *

I have 90% of the harness connections made.. My biggest issue is that I am not 100% sure where the voltage regulator wires in.. Should the blue DF wire go to the regulator from the engine go to the regulator then back to the main harness? What about the black wire from the alternator? I believe that hooks onto the brush pack on the back of the alternator but does that directly hook into main harness plug?

I have everything else figured out..


I have a 1970 914-6 and have spent plenty of time going through the wiring, so I can see why you are having problems. First of all, a regulator board is different on a 914-4 and 914-6. Secondly, the wires going to my alternator are Big red to B+, Small Red to D+, Black to DF and Brown to Ground. I do not have a blue wire. The Small Red, Black and Brown goes to the regulator board as a 3 prong plug that daisy chains to the voltage regulator. Hope this helps.
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gereed75
post Apr 26 2020, 01:34 PM
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Welcome Chuck. Where do you live in PA?
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Chuck53
post Apr 26 2020, 02:04 PM
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QUOTE(gereed75 @ Apr 26 2020, 03:34 PM) *

Welcome Chuck. Where do you live in PA?


Slatington, Pa, close to Coplay, Pa
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mepstein
post Apr 26 2020, 04:24 PM
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QUOTE(Chuck53 @ Apr 26 2020, 04:04 PM) *

QUOTE(gereed75 @ Apr 26 2020, 03:34 PM) *

Welcome Chuck. Where do you live in PA?


Slatington, Pa, close to Coplay, Pa

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930cabman
post Mar 15 2024, 05:12 PM
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QUOTE(ClayPerrine @ Apr 14 2020, 02:46 AM) *

QUOTE(roblav1 @ Apr 13 2020, 07:00 PM) *

Holy cow! Thank you. I'm at the same place as Ben, but my engine is 930/02 with a new internal alternator.


Yours is very simple. Look at the 4 cylinder relay board. there is a 3 pin connector where the /4 alternator harness plugs in. Coming from the alternator, there is a single blue wire. Hook the single blue wire to the front most pin on the 3 pin alternator connector.

Clay


Clay,

Please confirm which is the "front most pin" on the /4 relay board. I am just about ready to turn the ignition switch for the first time with this multi year /6 conversion build. Alternator with built in regulator has been tested. Besides the blue wire, I also have an extra red wire.

Thank you
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ClayPerrine
post Mar 16 2024, 04:14 AM
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QUOTE(930cabman @ Mar 15 2024, 06:12 PM) *

QUOTE(ClayPerrine @ Apr 14 2020, 02:46 AM) *

QUOTE(roblav1 @ Apr 13 2020, 07:00 PM) *

Holy cow! Thank you. I'm at the same place as Ben, but my engine is 930/02 with a new internal alternator.


Yours is very simple. Look at the 4 cylinder relay board. there is a 3 pin connector where the /4 alternator harness plugs in. Coming from the alternator, there is a single blue wire. Hook the single blue wire to the front most pin on the 3 pin alternator connector.

Clay


Clay,

Please confirm which is the "front most pin" on the /4 relay board. I am just about ready to turn the ignition switch for the first time with this multi year /6 conversion build. Alternator with built in regulator has been tested. Besides the blue wire, I also have an extra red wire.

Thank you


Take a look at this diagram:

(IMG:http://www.914world.com/bbs2/uploads/post-1143-1694107603.jpg)

The wire from the alternator needs to be hooked to the "D+" connection on the relay board. It is the one with the Blue wire in the diagram. Hook the blue wire from the alternator to that connection.
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930cabman
post Mar 16 2024, 04:41 PM
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QUOTE(ClayPerrine @ Mar 16 2024, 04:14 AM) *

QUOTE(930cabman @ Mar 15 2024, 06:12 PM) *

QUOTE(ClayPerrine @ Apr 14 2020, 02:46 AM) *

QUOTE(roblav1 @ Apr 13 2020, 07:00 PM) *

Holy cow! Thank you. I'm at the same place as Ben, but my engine is 930/02 with a new internal alternator.


Yours is very simple. Look at the 4 cylinder relay board. there is a 3 pin connector where the /4 alternator harness plugs in. Coming from the alternator, there is a single blue wire. Hook the single blue wire to the front most pin on the 3 pin alternator connector.

Clay


Clay,

Please confirm which is the "front most pin" on the /4 relay board. I am just about ready to turn the ignition switch for the first time with this multi year /6 conversion build. Alternator with built in regulator has been tested. Besides the blue wire, I also have an extra red wire.

Thank you


Take a look at this diagram:

(IMG:http://www.914world.com/bbs2/uploads/post-1143-1694107603.jpg)

The wire from the alternator needs to be hooked to the "D+" connection on the relay board. It is the one with the Blue wire in the diagram. Hook the blue wire from the alternator to that connection.


Great information, thanks again.
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