Head lights out / #45 and #46 relays

[Jay]

Hello, I recently had the problem of both headlights going out, replaced the #46 HDM relay, problem fixed. Now 3 months later same problem, and when i swapped the #45 and #46 relays to test it, the fan relay (with #46 inserted) started smoking? Has anyone had this problem when swapping these 2? Could it be they sold me the wrong relay?

 

[The_Roadie]

Rare, since the pin locations are different. What exactly do the relay housings look like and have printed on them? Do you have a voltmeter and some electrical troubleshooting experience to follow the schematics?

 

[Jay]

Thanks for the reply, yes I do have a voltmeter at the house i can check when i get off work. Im not too savvy with electrical components however. I did check both fuses (#3,#6) and they were fine. The replacement relay does not have any #'s on the top, but has "0612 SH276" on the side. The # 45 relay has "10516745" stamped on top. Both also have same prong pattern.

 

[Jay]

Ok, just pulled the fuse for the HLM (#53) and it was blown. Replaced it and lights are back on!

 

[The_Roadie]

All you have to worry about now is the fan clutch.

 

[Jay]

All you have to worry about now is the fan clutch.

LOL, yeah we replaced that about a year ago now. And i'm on the 3rd water pump, granted i have 180,000+ miles on it and had it since brand spanking new! Thanks for all your help Bill, seems anytime i look up a problem it's your answer that I find!

 

[Joey71]

Hey i have the same issue, but my #53 states that is EAP not HLM is it the samething.. By the way my highbeams work fine and #'s 3 and 5 fuses are good need help here guys

 

[The_Roadie]

Hey i have the same issue, but my #53 states that is EAP not HLM is it the samething.. By the way my highbeams work fine and #'s 3 and 5 fuses are good need help here guys

I agree that the RELAY #53 is for EAP. I have no idea what Jay meant by fuse #53 or "HLM". Relay #46 is called the "HDM", which stands for HeaDlamp Module because it's actually a miniature solid-state electronic module and not strictly speaking a relay.

If you have a failure in the low beams, what have you done so far to troubleshoot it? Have you swapped relays 45 and 46? Checked fuses 3 and 6? Measured the bulbs with a meter to see if you have the rare but possible dual-lamp failure? Ray cautions all the time about how you troubleshoot your house wiring? When a lamp quite working, is the first thing you look for a bad SWITCH?!?!?! Naw - it's the LAMP.

 

[Joey71]

Yes i swapped out # 45 and # 46 lights still out. I checked both bulbs, balast, harness and lights still out all fuses good.. Highbeams work so not the switch

 

[Jay]

I'm sorry, it was HDM not HLM... But my #53 is a 15A mini fuse marked HDM and sits right next to the #46 relay.

 

[The_Roadie]

... balast, ...

Say what? You have HIDs? What DRL killer circuit are you using?

I should have asked on post #1 if you had anything aftermarket installed. You could have two fried ballasts if you weren't using a DRL killer. Catch me up here.