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Installing wiring for towing

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Old 03-25-2011, 01:48 PM   #1
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Installing wiring for towing

Hi - I have an 08' SR5 Tacoma without the wiring for towing, so I picked up a harness and I just have to clip the wire harness near the bumper and replace with this one. I noticed that under the hood there is a space for a towing relay and mine is empty. So I guess that Tacomas that come wired for towing come with this relay and a dedicated harness? I should be ok to do as I plan by replaing the harness?

Thanks!
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Old 03-25-2011, 01:57 PM   #2
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A good aftermarket harness will plug in-line into existing harness sockets at the tail lights.

If yours "crimps" onto existing insulated wires , return it and get a good Toyota-specific one.
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Old 03-25-2011, 02:04 PM   #3
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The harness does have all the wiring and sockets for the tail lights too, but I will need to cut the original harness before the splits for the taillights and towing wiring and wire in this one. It does not jus crimp to the wiring, no.
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Old 03-27-2011, 05:27 AM   #4
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Quote:
Originally Posted by bjmoose View Post
A good aftermarket harness will plug in-line into existing harness sockets at the tail lights.

If yours "crimps" onto existing insulated wires , return it and get a good Toyota-specific one.
x2....a quality harness has plugs that match your tail light harnesses - no cutting requried!

As far as the relay is concerned, it is likely for the 7 pin connector or maybe a brake controller...I'm not sure what exactly comes with the stock towing package. However, a simple 4-pin connector doesn't need a relay because trailer lights (which nowadays are typically LEDs) don't typically draw enough current to put your stock wiring at risk. The wiring harness paperwork should speak to this fact.
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