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

Lightbar relay switch help

Discussion in 'Lighting' started by Ambiguouse, Apr 25, 2019.

  1. Apr 25, 2019 at 6:48 PM
    #1
    Ambiguouse

    Ambiguouse [OP] do you even taco

    Joined:
    Apr 25, 2015
    Member:
    #153895
    Messages:
    190
    Gender:
    Male
    First Name:
    Steven
    Riverside, CA
    Vehicle:
    2015 Tacoma PreRunner Double cab
    -coil spring double wishbone front suspension - rear leaf spring suspension with staggered gas shock absorbers - 16" styld steel wheels BFG tires - engine skid plate - off road tuned suspension with bilstein shocks - 20% front windows tint - limo tint back door widows
    My light bar hasn’t been working for a cool minute and figured out that my relay switch was the problem. My new relay came in today I switched it up and my bars working again finally!
    My question is can I wrap the relay switch with electrical tape or even duct tape? Just for protection against water or other stuff. But I noticed how hot the relay switch gets when the bars on and it doesn’t seem safe to wrap it with any type of tape that can be flammable. Wondering what can I use to wrap or put anything around the relay switch for protection?

    D595A1E9-A96F-4F88-9CD4-84FEF049F233.jpg
    44F4493C-36AC-4556-BC92-EBF48073BBDB.jpg
     
  2. May 3, 2019 at 6:54 AM
    #2
    JustinL

    JustinL Well-Known Member

    Joined:
    Jan 31, 2011
    Member:
    #50299
    Messages:
    3,679
    Gender:
    Male
    First Name:
    Justin
    Berlin, CT
    Vehicle:
    2009 TRD OffRoad DCSB Pyrite Mica
    2012 Conversion
  3. May 3, 2019 at 7:04 AM
    #3
    maxtherat

    maxtherat Well-Known Member

    Joined:
    Jan 21, 2015
    Member:
    #146908
    Messages:
    1,301
    Gender:
    Male
    First Name:
    Jason
    San Clemente, Ca
    Vehicle:
    2017 Subaru Forester XT
    LED Fog lights. STI midpipe soon to come
    I personally would and do use diaelectric grease on the connections. It helps prevent corrosion, repels moisture and promotes the connection between the relay terminals and wire connectors. I absolutely would not wrap it in duct tape but don’t see the harm in electrical tape. I’ve got relays that even came withheat shrink insulation on them. Nice looking truck btw.
     
  4. May 3, 2019 at 7:22 AM
    #4
    n6vmo

    n6vmo Well-Known Member

    Joined:
    Jan 1, 2018
    Member:
    #239972
    Messages:
    527
    Gender:
    Male
    Vehicle:
    2018 DCLB OR AT Super "Priviledged"
    Bilstein 6112, ICON UCAs, 5160, AAL, 265/75/16 Falken Wildpeaks
    Hmm...your relay shouldn't get that hot. Are your wires hot too?

    Your 40 amp relay certainly displays the specs to handle it. The control coil inside the relay is a fairly high resistance coil and should draw very little current when operating, not heating up at all.
    Measure that coil resistance if you can and report back your findings

    If the relay is getting hot and your wires are not, then there may be a little to much resistance from the C to NO contacts (light bar control contacts). This little bit of resistance will cause the relay contacts to heat up when drawing a large amount of current. This is typical in low quality relays.

    Disconnect only the light bar at the relay and enable the relay with your light bar switch. Wait to see if it gets hot without powering the light bar. Let us know what you find.
     
    Last edited: May 3, 2019
    paranoid56 likes this.
  5. May 6, 2019 at 8:41 AM
    #5
    paranoid56

    paranoid56 Well-Known Member

    Joined:
    Jul 25, 2012
    Member:
    #83443
    Messages:
    3,017
    Gender:
    Male
    San Diego
    Vehicle:
    14 double cab taco
    what the guy above said. the relay shouldnt be getting hot.
     

Products Discussed in

To Top