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1985 Toyota 4Runner Power Antenna Replacement

After accidentally bending my power antenna about a year earlier on an overhanging tree branch, I was faced with a repair or replacement of the unit. It still operated for the most part, but would not fully retract nor was the reception as good as it was before the damage. I though about using an aftermarket power antenna, they run about $40-60 and would do the job nicely. However, one thing that the aftermarket units do that the Toyota antenna does not is that they go up automatically when the radio is on. The Toyota antenna has a separate up/down switch that controls the antenna independent of the radio. This is very handy if you need to lower the antenna part way or fully while still leaving the radio on, for example to play a tape or CD on the trail.

A manual antenna was another option, but I figured since the wiring for the factory power antenna was already in place and it otherwise worked fine, that a $40 replacement antenna mast kit from Toyota was the best option for me.

See below for the replacement steps:

 
  To remove antenna, loosen the round retaining nut at the base of the antenna.  Then remove the plastic wheel well liner inside the fender and the 10mm bolt that holds the antenna motor in place.  Unclip the power plug and cut the antenna cable free of the sealant and remove it from the base of the antenna. One the antenna unit is free, loosen the clamp that holds the antenna to the base to the motor assembly and pull it up and off of the antenna itself.  I use a replacement antenna mast kit to repair my '85 4Runner power antenna, p/n: 86353-89127. Remove the retaining nut in the center and the mounting screws on the side of the cap that covers the retracting drum.  Pull the drum off and work the old antenna core free of the friction clip in the edge of the drum.  Then discard the old antenna and slip the end of the core of the new antenna into the drum.  Do not trim the core. The replace the drum and cover, reinstall the screws and the center nut and then slide the antenna base over the new antenna, slip it into the clamp and tighten.  Make sure to replace the plastic drip cover over the motor. Replace the power connector and antenna cable, sealing the junction with silicone sealant.  Then slip the antenna up through the hole, install the lower retaining bolt, then the upper trim pieces and finally tighten the top retaining nut.  Test the antenna for proper operation and then replace the plastic wheel well liner.  Test the antenna extension and retraction, should see a raised height of approx. 30  
 



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