RTCalifornia
Well-Known Member
- First Name
- RT
- Joined
- Sep 24, 2020
- Threads
- 13
- Messages
- 62
- Reaction score
- 89
- Location
- California
- Vehicle(s)
- 2021 JLR, 2020 X3 M40i, 2019 M4 Cv Comp, 2013 Abarth
- Occupation
- Multi Cloud Engineering
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- #1
Wanted to share the electrical connection to Baja Design LP6 using the factory Aux1 and Aux2 switch. This circuit insures that Lo and Hi beams (pin 1 and 4) are never energized together at the same time. I used 2 automotive relays, one of them was setup to isolate high and low beam, similar to the Baja circuit recommendation. I tapped the Amber backlight to the parking light so it would only come on when I have the parking light or headlights on.
Disclainer: Implementing this circuit will requires soldering and some technical electronic understanding of relay and how they function. I am sure there are other methods, including using a DPDT switch instead but this is more about what I did to get it to work without the possibility of damaging the LP6.
The re-wiring was pretty simple to implement.
Parts used:
Jeep JL/JT, Rubicon Steel Bumper Kit, LP6. SKU: 447671
5 Pack -30/40 AMP Relay Harness Spdt 12V (from Amazon)
1/8" and 1/4" heat shrink tubing (from Amazon)
Back ground:
I ordered the LP6 kit for the JL which included the wiring harness with a toggle switch and the 2x LP6 lights. After mounting the LP6 to my steel bumper, I realize the wiring kit included requires mounting a toggle switch inside the cabin to switch between High Beam and Low Beam. Since I already have the Aux switches inside my jeep, I was not going to do that.
Ok well, easy, just connect Lo beam to Aux1 and Hi beam to Aux2 right? WRONG. Baja Design stated that Lo beam and Hi beam must not be energized at the same time. If for some reason, I hit the Aux1 switch to turn on the Lo beam and later want to use the Hi beam, I would have to always remember to de-active the Aux1 switch prior to pressing the Aux2 switch and vice versa. That is a mistake waiting to happen especially when I am busy driving off road. I decided to build a circuit that would make Aux2 (Hi beam) take precedence when both Aux1 and Aux2 switches are activated. Basically the wiring kit included was useless...well, not completely. I was able to use the pre-wired Deutsch connector with the extra long harness. I had to order extra automotive relays to complete the new design.
The Circuit.
This circuit uses a dedicated SPDT relay to isolate Hi beam and Lo beam. This guaranty that only the Hi or the Lo beam will be energize at a time and never simultaneously as required by Baja Desgin.
Here is the truth table for all the scenarios of the Aux1/Aux2 and expected Hi/Lo beam output operation. Basically when both Aux2 and Aux1 are energized, the Hi beam will take priority.
The relay circuit is here: Pretty simple to wire up. The circuit shows a connection to a single Deutsch connector to reduce clutter on the diagram. To connect to the 2nd LP6, simply connect the wires up in parallel.
Here is what it looks like after wiring everything up.
For the Amber backup light, I tapped it to the passenger side fender LED. The first wire in the fender LED assembly energized when the parking or headlight is enabled. Works very well with no problems. I had to remove 2x 10mm screws holding the inner fender in to access the fender LED wires. Here is the picture.
I tapped the 1st wire as shown in the picture.
RT
Disclainer: Implementing this circuit will requires soldering and some technical electronic understanding of relay and how they function. I am sure there are other methods, including using a DPDT switch instead but this is more about what I did to get it to work without the possibility of damaging the LP6.
The re-wiring was pretty simple to implement.
Parts used:
Jeep JL/JT, Rubicon Steel Bumper Kit, LP6. SKU: 447671
5 Pack -30/40 AMP Relay Harness Spdt 12V (from Amazon)
1/8" and 1/4" heat shrink tubing (from Amazon)
Back ground:
I ordered the LP6 kit for the JL which included the wiring harness with a toggle switch and the 2x LP6 lights. After mounting the LP6 to my steel bumper, I realize the wiring kit included requires mounting a toggle switch inside the cabin to switch between High Beam and Low Beam. Since I already have the Aux switches inside my jeep, I was not going to do that.
Ok well, easy, just connect Lo beam to Aux1 and Hi beam to Aux2 right? WRONG. Baja Design stated that Lo beam and Hi beam must not be energized at the same time. If for some reason, I hit the Aux1 switch to turn on the Lo beam and later want to use the Hi beam, I would have to always remember to de-active the Aux1 switch prior to pressing the Aux2 switch and vice versa. That is a mistake waiting to happen especially when I am busy driving off road. I decided to build a circuit that would make Aux2 (Hi beam) take precedence when both Aux1 and Aux2 switches are activated. Basically the wiring kit included was useless...well, not completely. I was able to use the pre-wired Deutsch connector with the extra long harness. I had to order extra automotive relays to complete the new design.
The Circuit.
This circuit uses a dedicated SPDT relay to isolate Hi beam and Lo beam. This guaranty that only the Hi or the Lo beam will be energize at a time and never simultaneously as required by Baja Desgin.
Here is the truth table for all the scenarios of the Aux1/Aux2 and expected Hi/Lo beam output operation. Basically when both Aux2 and Aux1 are energized, the Hi beam will take priority.
The relay circuit is here: Pretty simple to wire up. The circuit shows a connection to a single Deutsch connector to reduce clutter on the diagram. To connect to the 2nd LP6, simply connect the wires up in parallel.
Here is what it looks like after wiring everything up.
For the Amber backup light, I tapped it to the passenger side fender LED. The first wire in the fender LED assembly energized when the parking or headlight is enabled. Works very well with no problems. I had to remove 2x 10mm screws holding the inner fender in to access the fender LED wires. Here is the picture.
I tapped the 1st wire as shown in the picture.
RT
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Last edited: