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> LED Headlights: Turning on the fogs turns on the high beams, too!, New behavior, fogs worked normally until LED headlights installed.
Chi-town
post Mar 30 2019, 10:56 PM
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Could you separate the ground for the fog relay from the high beam circuit?
Give it an actual ground and turn them off manually when using high beams?
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Spoke
post Mar 31 2019, 06:37 AM
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QUOTE(Chi-town @ Mar 31 2019, 12:56 AM) *

Could you separate the ground for the fog relay from the high beam circuit?
Give it an actual ground and turn them off manually when using high beams?


Separating the ground for the fog relay would negate the need for the fog light relay to have a ballast resistor. It would make the fog light independent of the high/low beam.

Here's how the '74 914 foglights are connected. Notice the white/blue wire from the fog light relay to the top of fuses 1 and 2. Likely this wire is connected at the fuse panel and able to be easily disconnected. Then make a short pigtail with a male spade on one side and a ring terminal on the other side. Connect the male spade to the white/blue wire and the the ring terminal to a nearby chassis bolt.

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Mikey914
post Mar 31 2019, 12:52 PM
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The load resistor needs to be on the low beam, to trigger the relay.
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Chi-town
post Apr 1 2019, 02:11 PM
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Easiest way
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Spoke
post Apr 1 2019, 04:00 PM
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QUOTE(Chi-town @ Apr 1 2019, 04:11 PM) *

Easiest way


It could be so that this wire is found on the lugs on the fuse panel for fuse 1 or 2. Easily removed and with a pigtail with male spade on one side and ring terminal on the other side, the modification "should" be an easy update. The fogs would be on then with low or high beam.

Talking to Bruce today, I realized my 930 with LED headlights has the same connections as the 914. I haven't tried the foglights with the LED headlights to see if they still work. Will have to try it this weekend.
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bdstone914
post Apr 2 2019, 08:43 AM
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QUOTE(Spoke @ Apr 1 2019, 03:00 PM) *

QUOTE(Chi-town @ Apr 1 2019, 04:11 PM) *

Easiest way


It could be so that this wire is found on the lugs on the fuse panel for fuse 1 or 2. Easily removed and with a pigtail with male spade on one side and ring terminal on the other side, the modification "should" be an easy update. The fogs would be on then with low or high beam.

Talking to Bruce today, I realized my 930 with LED headlights has the same connections as the 914. I haven't tried the foglights with the LED headlights to see if they still work. Will have to try it this weekend.


@Chi-town
@spoke
@mikey914
@matty900

Dylan, ( Chi-town)
Anxious to see if it works.
Will be glad to help and document exactly how it it done.
Bruce
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Spoke
post Apr 2 2019, 11:20 AM
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I may drop the fuse panel this weekend in my 914 to look for the white/blue foglight wire.
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bdstone914
post Apr 2 2019, 06:06 PM
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QUOTE(Spoke @ Apr 2 2019, 10:20 AM) *

I may drop the fuse panel this weekend in my 914 to look for the white/blue foglight wire.



@spoke
@chi-town
Dylan is going to try the same on a 914.

I like the option of separating the operation of the dogs from the headlights.

Still looking at best mounting for the load resitor.
Here is where I think it should go. Thick metal and air flow when the lights are up.


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Spoke
post Apr 6 2019, 10:34 AM
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QUOTE(Spoke @ Apr 1 2019, 06:00 PM) *

Talking to Bruce today, I realized my 930 with LED headlights has the same connections as the 914. I haven't tried the foglights with the LED headlights to see if they still work. Will have to try it this weekend.


Confirmed today that the foglights on the 930 do work with low beams and turn off with high beams. It could be so that the LED headlights on the 930 have a different impedance than the ones on the 914.
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orthobiz
post Apr 6 2019, 11:00 AM
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I never posted my final solution. I had the fogs wired separately so no more hi beam/lo beam woes.

Paul
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FlacaProductions
post Apr 6 2019, 01:13 PM
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separately? you mean direct and bypassing the interconnection/relay with the hi/lo switch?
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orthobiz
post Apr 6 2019, 02:35 PM
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QUOTE(FlacaProductions @ Apr 6 2019, 03:13 PM) *

separately? you mean direct and bypassing the interconnection/relay with the hi/lo switch?


Yes, direct separate wiring. Actually Brad/Michael at 914ltd did it for me.

Paul
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drem914
post Apr 7 2019, 10:32 AM
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QUOTE(Mikey914 @ Mar 31 2019, 11:52 AM) *

The load resistor needs to be on the low beam, to trigger the relay.


Mark, I purchased the resistor from you, but am still waiting on a final wiring diagram so I know where and how to connect up. Scott said you might have that out soon?
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Spoke
post Apr 7 2019, 09:48 PM
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I modified the headlight/foglight schematic to show where the foglight relay attaches to the high beam lights. Turns out the 914 is wired such that the white/blue wire from the foglight relay is connected directly to the spade connected to the high/low beam relay.


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Spoke
post Apr 7 2019, 09:52 PM
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I decided to rewire the foglight to be independent of the high beams. Disconnected the battery negative cable and dropped the fuse panel.

The high/low beam relay is shown on the right side of the panel. The foglight wire is the white/blue wire. This wire will be cut and tied to ground.



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Spoke
post Apr 7 2019, 09:55 PM
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The white/blue wire to the foglight relay is cut and crimped to about 1 foot of wire. The other end of the wire has a ring terminal crimped on.



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Spoke
post Apr 7 2019, 09:57 PM
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The other end of the new wire is grounded on this lug. Now the foglights are independent of the high beams. With this modification , a ballast resistor will not be necessary when the headlights are LEDs.


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Mikey914
post Apr 7 2019, 10:18 PM
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This would actually be the preferred method of install as the resistors will generate heat.

Thanks Spoke
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Mikey914
post Apr 7 2019, 10:19 PM
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QUOTE(drem914 @ Apr 7 2019, 08:32 AM) *

QUOTE(Mikey914 @ Mar 31 2019, 11:52 AM) *

The load resistor needs to be on the low beam, to trigger the relay.


Mark, I purchased the resistor from you, but am still waiting on a final wiring diagram so I know where and how to connect up. Scott said you might have that out soon?

More than happy to take it back, Spoke’s solution is preferable.
Mark
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drem914
post Apr 8 2019, 09:05 AM
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QUOTE(Mikey914 @ Apr 7 2019, 09:19 PM) *

QUOTE(drem914 @ Apr 7 2019, 08:32 AM) *

QUOTE(Mikey914 @ Mar 31 2019, 11:52 AM) *

The load resistor needs to be on the low beam, to trigger the relay.


Mark, I purchased the resistor from you, but am still waiting on a final wiring diagram so I know where and how to connect up. Scott said you might have that out soon?

More than happy to take it back, Spoke’s solution is preferable.
Mark



Thank you, I'll bundle it up and send it back. It's stlll in the orignal bag you sent it in.
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