Do halogen and HID systems use the same relays?

I ask because my headlights are only getting 8v. Lights (LED halogen replacements) are very dim and flicker. Further they go out completely on when I turn on my brights. I've traced it to HL-P (if I tap on it, they sometimes come on bright as normal).

I'm going to be near a pick and pull next week and wanting to know if I can pull relays from a HID system Prius or if I need to make sure it's halogen as well. I'm wanting to replace the HL-P relay for sure and grab a spare DIM relay just in case, because the brights issue seems sus as well.

 

I just double checked. I had the dash in the wrong place. I meant the H-LP relay. Sorry for the confusion.

What I'm wanting to do is go to u-wrench salvage yard and get some replacements relays for my halogen system.

I just want to make sure I don't grab an incompatible relay. The H-LP relay has a part number, so easy enough to make sure it's the same from the donor car. The DIM relay is just blue and I can't find a part number printed on it. Wanting to see if I need to make sure the donor car is also halogen or if HID relays would be okay?

 

Thanks for checking! The issue I'm having is the junkyard doesn't have many Priuses these days. So I'll be lucky if they have any. I know the wiring is different which made me wonder if the relays where different.

 

The wiring is already halogen; ie: the car has H4 headlight connectors that don't have a ballast and output 12v. The issue is I live in the hicks and the closest salvage yard tends to have a very limited selection of Priuses. There's a good chance they'll only have 1 or less gen 2s. My H-LP relay has a part number printed on it so that'll be easy to check. The DIM relay which controls brights and dim is just blue, there's no part number printed on it, and when I try to look online for it, they don't specify whether it's for halogen or HID.

H-LP has a part number: 90987-02025, 156700-2540. If the salvage yard only has HID Priuses then I know as long as the part numbers match then then they are the same.



The DIM relay is just a blue box that doesn't have a part number. Therefore if the salvage yard only has HID Priuses the only thing I have to compare the relays is blueness.

 

Okay never mind I figured it out. I found this site that let's you put in your frame number which I found with Techstream.

https://toyota-usa.epc-data.com/prius/nhw20/1305/electric/8401/85916U/

It looks like the relays are in fact the same. Further I now know the relay labeled DIM is also called Headlamp Relay No. 2
And I have a part number now! 90987-04010

And more important to answer my initial question for some future researcher: it's a general relay that seems to be used for a lot of things so should be interchangeable between headlight systems. It looks to be used in a lot of different Toyota owned brands like Toyota, Nissan, Scion and so fourth.

 

Okay I sanded the relay blades and those things are fricken copper! I had no idea because all the corrosion. I end up using a helping hands to hold the relay in some CLR just deep enough for the blades to be submerged. Then I washed it off with some rubbing alcohol. Currently letting it dry.

Here's hoping and thanks for the tip!

 

Holy crap that fixed it! Thanks again.

 

I'm not really a car person. Mea Cupla but I appreciate the correction!


Back on to the thread:

The relay failed again. I'm just gonna get a junker relay. I think it's supposed to have a nickle coating, and the sand paper just kind of removed it. On the bright side it's a common relay it seems.

 

One thing I'm learning working on my car is Toyota seems to like to use the same parts for as many things as possible.