How to:
I have many requests and questions about how to wire the front marker (park) lamps for DRLs. (for imported US cars)
so.
in order to help others out here is a quick write up...
my pictures are not great as the macro on my camera isn't working.
Some attempts to wire the DRLs using the front marker lamps turn on all the other park lamps, rear, side, marker lamps. As well dim the clock, radio, and heating controls making it impossible to see during in the day light.
This is a poor solution as you end up driving with your park lamps on 100% of the time. As well you may notice your AC fans are running all the time.
The fix is to power the park lamps as per factory wiring and still have the only the front markers on. (and have one not effect the other)
The compent to solve this is qty. 4 recifying diodes. Two for each lamp. These diodes will isolate the park lamp cct from the DRL cct.
rough schematic: red for what to add to your car's wiring.
To start with, fuse #3 under the dash on the drivers side is built for the DRL cct. Not used on US cars. (there still may be a fuse in the slot)
This fuse #3 has +12 V only when the key is in the on position. I used a spade lug to connect where the fuse was and connected a fuse holder with a 5 - 7.5 amp fuse and lead the wire through the firewall into the front of the car. (see picture) I pushed the wire through an existing gromit using a sharp solid wire.
When routing the wire to the park lamps, be careful to ensure that the wire does not interfear with the pop up head lamps. It is easy to get the wire caught up in the head lamp mechanisim.
connecting the diodes for each lamp. (note the white stripe ->towards the lamp)
View attachment 61172
connection to fuse box
View attachment 61173
wire through fire wall
wire from one marker lamp to another
where to put the diodes (sorry they are covered with tape.
From this fused wire, you need to power your front marker lamps through a pair of Diodes. ( one for each lamp) These diodes need to be installed with the stripe towards the lamps (very important!)
As well you need to install a second pair of diodes in the park lamp cct. at each lamp.
You will notice there are three wires to each lamp. two red (+itive) and 1 black (grnd). cut the two red at each lamp, strip them and twist together. They do not need to be isolated. connect the two diodes at each lamp in a y connection. The common point (diode stripe side) towards the lamp. Solder and insulate with heat shrink and tape. Connect the other end of the park lamp cct to one diode, and your new wire form fuse #3 to the other diodev.
I have included a very rough schematic of the wiring; a picture of the diodes for each lamp, a factory dash fuse box diagram to show the detail on how to.
http://www.nsxprime.com/forums/attachment.php?attachmentid=60966&d=1251764394
result!
Not sure if I have explained this well or not. Let me know if you need me to clairify anything.
I have many requests and questions about how to wire the front marker (park) lamps for DRLs. (for imported US cars)
so.
in order to help others out here is a quick write up...
my pictures are not great as the macro on my camera isn't working.
Some attempts to wire the DRLs using the front marker lamps turn on all the other park lamps, rear, side, marker lamps. As well dim the clock, radio, and heating controls making it impossible to see during in the day light.
This is a poor solution as you end up driving with your park lamps on 100% of the time. As well you may notice your AC fans are running all the time.
The fix is to power the park lamps as per factory wiring and still have the only the front markers on. (and have one not effect the other)
The compent to solve this is qty. 4 recifying diodes. Two for each lamp. These diodes will isolate the park lamp cct from the DRL cct.
rough schematic: red for what to add to your car's wiring.
To start with, fuse #3 under the dash on the drivers side is built for the DRL cct. Not used on US cars. (there still may be a fuse in the slot)
This fuse #3 has +12 V only when the key is in the on position. I used a spade lug to connect where the fuse was and connected a fuse holder with a 5 - 7.5 amp fuse and lead the wire through the firewall into the front of the car. (see picture) I pushed the wire through an existing gromit using a sharp solid wire.
When routing the wire to the park lamps, be careful to ensure that the wire does not interfear with the pop up head lamps. It is easy to get the wire caught up in the head lamp mechanisim.
connecting the diodes for each lamp. (note the white stripe ->towards the lamp)
View attachment 61172
connection to fuse box
View attachment 61173
wire through fire wall
wire from one marker lamp to another
where to put the diodes (sorry they are covered with tape.
From this fused wire, you need to power your front marker lamps through a pair of Diodes. ( one for each lamp) These diodes need to be installed with the stripe towards the lamps (very important!)
As well you need to install a second pair of diodes in the park lamp cct. at each lamp.
You will notice there are three wires to each lamp. two red (+itive) and 1 black (grnd). cut the two red at each lamp, strip them and twist together. They do not need to be isolated. connect the two diodes at each lamp in a y connection. The common point (diode stripe side) towards the lamp. Solder and insulate with heat shrink and tape. Connect the other end of the park lamp cct to one diode, and your new wire form fuse #3 to the other diodev.
I have included a very rough schematic of the wiring; a picture of the diodes for each lamp, a factory dash fuse box diagram to show the detail on how to.
http://www.nsxprime.com/forums/attachment.php?attachmentid=60966&d=1251764394
result!
Not sure if I have explained this well or not. Let me know if you need me to clairify anything.
Last edited: