When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I was trying to isolate a rattle in the trunk, and I might have pulled this out, or it might have been loose already, anyone have any idea what this is for? Everything seems to be working apart from the reverse light on the driver side, which might be a bulb (I haven't had a chance to pull it off yet.
Do you have the third brake light on the deck of the back window or do you have a trunk lid spoiler? I'm guessing the light is in the back window the way the wire is running.
Do you have the third brake light on the deck of the back window or do you have a trunk lid spoiler? I'm guessing the light is in the back window the way the wire is running.
Since you have both then the trunk lid spoiler is an aftermarket addon, as the SV sport, which I have now, came from the factory with the spoiler and no third brake light in the back window. The spoiler electrical had to be spliced into the third brake light somehow. I believe those two wires go directly to the third brake light in the back window, You might be able to access the third brake light from the back seat, at least I could with my 5th generation max when I installed a spoiler.
Last edited by Richard66; Dec 29, 2019 at 07:41 AM.
Since you have both then the trunk lid spoiler is an aftermarket addon, as the SV sport, which I have now, came from the factory with the spoiler and no third brake light in the back window. The spoiler electrical had to be spliced into the third brake light somehow. I believe those two wires go directly to the third brake light in the back window, You might be able to access the third brake light from the back seat, at least I could with my 5th generation max when I installed a spoiler.
It looks like an OEM wing, maybe a dealer added option? My SV does not have the sport package. So I would assume so going by the brochure.
Yeah, the brochure mentions the dealer option of adding the spoiler. however, considering that none of them are currently lighting up, it makes me wonder if the area where it's spliced fell apart for some reason.
I can't seem to find the wire for the third break light, any have some guidance here? I assume if nothing else I can splice it into any of the two rear breaks?
You got to start by pulling the necessary panels etc to get to the third brake light in the back window and/or the trunk spoiler and start following wires. You should find a break in the wires somewhere. The mystery should reveal itself. Have you at least tried pulling all the trunk liner panels as step 1? You might be able to figure it out quit easily.
You got to start by pulling the necessary panels etc to get to the third brake light in the back window and/or the trunk spoiler and start following wires. You should find a break in the wires somewhere. The mystery should reveal itself. Have you at least tried pulling all the trunk liner panels as step 1? You might be able to figure it out quit easily.
yes brake lights thanks
yes the liner is off on the top panel already and one of the sides as well.
Well, you are on the right track. Keep digging in and let us know what you find.
When I get back home I'll dive into it Thanks
Originally Posted by the loaner
Also check the wire bundle running from the truck to the trunk lid. I had several wires fail at the bend, caused all kinds of lightning issues.
The wire is actually coming out of that bundle, so I'm assuming this is the wire for the spoiler brake light, now I just need to find the wires that go to the third brake light inside the car. and find out why neither is getting any power.
I re-wired the spoiler brake light to the window one, even though neither worked (Figured the interior one might have been out) and still no go, I can't follow the cable coming into the brake lamp, it goes under the rear deck. I did verify with a voltmeter that no power was coming to the third brake light as well.
Since there is only a single fuse (10a) for all the brake lamps, it can't be that, the other 2 brake lights are working, There are however 2 brake lamp relays, are they generally one per side? or would it make more sense to be 1 for the outers, and 1 for the inner?
Welp, I verified that the wire was indeed for the spoiler brake light, and I also verified that both interior and exterior LEDs are dead, just to verify, I used a multimeter, switched to diode and it was showing 0 for both interior & exterior, however the corner brake lights were showing about .32v.
is my method OK here? I did wire the spoiler light off of the rear left brake lamp and nothing, so I figured it's toast.
Ahh nevermind, it seems at least the spoiler one is OK, I had it wired into the DRL pair, not the brake pair.
Based on the amount of investigative work that you've done, I would call it a day and tap into the brake lights and get your spoiler light working. No need to get the 3rd brake light in the rear window working.
Based on the amount of investigative work that you've done, I would call it a day and tap into the brake lights and get your spoiler light working. No need to get the 3rd brake light in the rear window working.
That's what I ended up doing, 3 lights is plenty ty.
Any idea what this wire is for?
