How to disable Gen1 DRL Daytime Running Lights

Discussion in 'Generation 1 Prius Discussion' started by 3prongpaul, Sep 25, 2015.

  1. 3prongpaul

    3prongpaul Hybrid Shop Owner, worked on 100's of Prius's

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    While DRLs are great where you need them (northern countries, rainy places) some people don't want them on all the time. The Gen1 Prius (2001-2003) with Factory DRL's is a bit a pain to defeat. You cannot just pull a fuse or relay and the main DRL relay is a complicated unit that is burried far far under the dash.

    The easiest way I've found to disable DRL is to cut a wire under the passenger side engine room fusebox. Under the fusebox is a junction point butt splice (E2 on the wiring diagram). It has 2 Red/Black and 2 Red/Green wires all tied together with black shrink tubing and a "ring bump" around the end. If you don't see the butt splice you may have to unravel some of the electrical tape to expose it. If you cut the Red/Black wire with silver dots the DRL feature will stop working, but headlights will work normally if you turn the headlight switch on.

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    If you strip the ends of the cut wire and put male/female connectors you can re-enable them easily at a later time....perhaps disable for summer and enable for winter months. You could also extend the cut wires and install a more accessible toggle switch.
     
    #1 3prongpaul, Sep 25, 2015
    Last edited: Oct 27, 2015
    bisco likes this.
  2. bisco

    bisco cookie crumbler

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    thanks. if i had them i would disable them, waste of fuel.
     
  3. valde3

    valde3 Senior Member

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    Has somebody found a way to disable it in gen 2?

    Looking at wiring diagram only possible way seems to be to bypass the body ecu and connect headlight switch directly to light relays.
     
  4. bigblock67

    bigblock67 424k and terminal maybe

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    Hey.. found this post yesterday from 4 years ago and was just what I needed. My 02 has 429k miles and I have been thru at least 4 sets of lights. I cut the red/black strips with dots and poof ... out. Now I will upgrade to the brightest bulb I can .
    Never would have figured it out since I have little patience.
    Hope it makes it to 500k
    Thanks from Lebanon Indiana
    Don Maw
     
    #4 bigblock67, Jan 15, 2020
    Last edited by a moderator: Jan 16, 2020
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