1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Back Up Lights Relay in Engine Bay?

Discussion in 'Lighting' started by Burgman, Mar 6, 2011.

  1. Mar 6, 2011 at 2:45 PM
    #1
    Burgman

    Burgman [OP] I KEEEEEL YOU

    Joined:
    Apr 16, 2009
    Member:
    #16072
    Messages:
    26,682
    Gender:
    Male
    First Name:
    Stephen
    Ric VA
    Vehicle:
    08 PreRunner TRD sport Silver
    K&N intake, Boston Acoustic SL 60 6.5 components up front, Rockford Power T16 6.5 in rear, Pioneer P4100 HU, Soon to be Pioneer Prs 4200f
    So working on hooking up some back up lights and wanted to know if anyone knew which wire in the engine bay would be the correct wire to hook up the relay to. This would be to use less wire and keep the relay in a drier more protected area.

    Thanks again for the help
     
  2. Mar 6, 2011 at 8:42 PM
    #2
    joes06tacoma

    joes06tacoma Well-Known Member

    Joined:
    Jan 1, 2010
    Member:
    #28588
    Messages:
    3,056
    Gender:
    Male
    First Name:
    Joe
    Central Coast, CA
    Vehicle:
    06 4x4 Off Road Access Cab v6 6spd
    LEER Shell with dome lights operated with 3 way switches, aux backup lights with relay and 3 position switch, modified wiring to compass/temp display and clock to include switch that disables dimming function (poor man's DRL solution), Scan Gauge 2
    Red wire with a white stripe IIRC. Found it in the driver's kick panel on my truck. Don't think it runs through the under hood area. Might be able to find it at the tranny, but then you are tapping wires in a wet area. I would avoid that.
     
  3. Mar 7, 2011 at 6:10 AM
    #3
    Burgman

    Burgman [OP] I KEEEEEL YOU

    Joined:
    Apr 16, 2009
    Member:
    #16072
    Messages:
    26,682
    Gender:
    Male
    First Name:
    Stephen
    Ric VA
    Vehicle:
    08 PreRunner TRD sport Silver
    K&N intake, Boston Acoustic SL 60 6.5 components up front, Rockford Power T16 6.5 in rear, Pioneer P4100 HU, Soon to be Pioneer Prs 4200f
    thanks for the help guys, the red wire with the white strip is it, tested it with my volt meter... my only other question is when hooking the relay to a switch the wiring harness and the back up lights how do i use the two remaining pins to go to those 3?
     
  4. Mar 7, 2011 at 10:30 AM
    #4
    Burgman

    Burgman [OP] I KEEEEEL YOU

    Joined:
    Apr 16, 2009
    Member:
    #16072
    Messages:
    26,682
    Gender:
    Male
    First Name:
    Stephen
    Ric VA
    Vehicle:
    08 PreRunner TRD sport Silver
    K&N intake, Boston Acoustic SL 60 6.5 components up front, Rockford Power T16 6.5 in rear, Pioneer P4100 HU, Soon to be Pioneer Prs 4200f
    Awesome man thanks a lot, actually got them installed already... but this is good info to have
     
  5. Mar 7, 2011 at 3:08 PM
    #5
    monoman

    monoman Time to get dirty!

    Joined:
    Aug 18, 2008
    Member:
    #8607
    Messages:
    997
    Gender:
    Male
    First Name:
    Dave
    Exotic, San Jose, Cal.
    Vehicle:
    2003 Tacoma Dbl Cab 4X4
    I have a 1st gen. I tried this and threw a code, but I also just hooked up my rear aug lights to my bachup lights. Now, if I hooked the lights up with a relay, would it work without having a code come up? Also, would these diagrams work with the 1st gen too? Thanks.
     
  6. Mar 7, 2011 at 3:25 PM
    #6
    Burgman

    Burgman [OP] I KEEEEEL YOU

    Joined:
    Apr 16, 2009
    Member:
    #16072
    Messages:
    26,682
    Gender:
    Male
    First Name:
    Stephen
    Ric VA
    Vehicle:
    08 PreRunner TRD sport Silver
    K&N intake, Boston Acoustic SL 60 6.5 components up front, Rockford Power T16 6.5 in rear, Pioneer P4100 HU, Soon to be Pioneer Prs 4200f
    yea these wire diagrams arent going to work with a first gen

    what i ended up doing is using a 4 pin bosch type relay
    [​IMG]

    i wired mine just like this, but i ran the reverse light wire (oem) with the switch output to the 86 pin
     
  7. Mar 7, 2011 at 3:39 PM
    #7
    monoman

    monoman Time to get dirty!

    Joined:
    Aug 18, 2008
    Member:
    #8607
    Messages:
    997
    Gender:
    Male
    First Name:
    Dave
    Exotic, San Jose, Cal.
    Vehicle:
    2003 Tacoma Dbl Cab 4X4
    Yup, this is how I have them wired up now, but I thought it be kinda nice to be able to have them wired to the backups, via an on-off-on switch, so I could also turn them on manually when I want to. I'm just not sure if it would wind up throwing a code like I did before.
     
  8. Mar 7, 2011 at 3:43 PM
    #8
    Burgman

    Burgman [OP] I KEEEEEL YOU

    Joined:
    Apr 16, 2009
    Member:
    #16072
    Messages:
    26,682
    Gender:
    Male
    First Name:
    Stephen
    Ric VA
    Vehicle:
    08 PreRunner TRD sport Silver
    K&N intake, Boston Acoustic SL 60 6.5 components up front, Rockford Power T16 6.5 in rear, Pioneer P4100 HU, Soon to be Pioneer Prs 4200f
    what ur going to want to do is put a diode in between the oem reverse lights wire and where u join them to the switch... stops back feeding into the factory harness that might solve ur problem
     
  9. Mar 7, 2011 at 3:48 PM
    #9
    monoman

    monoman Time to get dirty!

    Joined:
    Aug 18, 2008
    Member:
    #8607
    Messages:
    997
    Gender:
    Male
    First Name:
    Dave
    Exotic, San Jose, Cal.
    Vehicle:
    2003 Tacoma Dbl Cab 4X4
    Cool, thanks. So what size diode though, do I just solder it in?
     
  10. Mar 7, 2011 at 4:26 PM
    #10
    Burgman

    Burgman [OP] I KEEEEEL YOU

    Joined:
    Apr 16, 2009
    Member:
    #16072
    Messages:
    26,682
    Gender:
    Male
    First Name:
    Stephen
    Ric VA
    Vehicle:
    08 PreRunner TRD sport Silver
    K&N intake, Boston Acoustic SL 60 6.5 components up front, Rockford Power T16 6.5 in rear, Pioneer P4100 HU, Soon to be Pioneer Prs 4200f
    a 3 amp diode from radioshack should work try to keep the solder from the diode itself and heatshrink it tight
     
  11. Mar 7, 2011 at 5:33 PM
    #11
    joes06tacoma

    joes06tacoma Well-Known Member

    Joined:
    Jan 1, 2010
    Member:
    #28588
    Messages:
    3,056
    Gender:
    Male
    First Name:
    Joe
    Central Coast, CA
    Vehicle:
    06 4x4 Off Road Access Cab v6 6spd
    LEER Shell with dome lights operated with 3 way switches, aux backup lights with relay and 3 position switch, modified wiring to compass/temp display and clock to include switch that disables dimming function (poor man's DRL solution), Scan Gauge 2
    Not sure why you are throwing a code. What was the code? The idea of a relay is to take the load off the factory reverse light switch and keep it from burning up. Others have tried direct tapping into that circuit and had no issues. I use relays on everything.

    We were just talking about how to trigger one relay with multiple sources here:
    http://www.tacomaworld.com/forum/lighting/143750-wiring-expert-help-needed.html
     
  12. Mar 9, 2011 at 2:59 PM
    #12
    monoman

    monoman Time to get dirty!

    Joined:
    Aug 18, 2008
    Member:
    #8607
    Messages:
    997
    Gender:
    Male
    First Name:
    Dave
    Exotic, San Jose, Cal.
    Vehicle:
    2003 Tacoma Dbl Cab 4X4
    Well, wasn't a code, but the "check engine" light came on. I had to reset it, remove all the wiring, and I haven't had a problem since.
     
To Top