1990-1993 Infiniti Q45 Headlight relay

[Infinitiguy19]

I have a spare 1990-1993 Q45 relay that I pulled off a 1991 Q5 with bad timing chain guides that had 138K miles and had been sitting for some time. I would like to know if this is worthy as a replacement without any re-soldering. http://picasaweb.google.com/lh...tlink http://picasaweb.google.com/lh...tlink http://picasaweb.google.com/lh...tlink

[qship96]

Is that the relays or the "headlamp bulb out monitor" module ?

[Infinitiguy19]

Thats the headlamp relay located near the coolant overflow bottle.

The headlamp sensor is a smaller square box located near the cabin (interior) fuse box.

[qship96]

I thought the headlamp sensor was near the overflow bottle?

[Infinitiguy19]

I am sorry but you must be mistaken. The 1996 Q45 service manual shows the location being near the coolant overflow tank. See page EL-374 of the 1996 Q45 service manual. The location of the headlamp relay remains the same from 1990-1995 Q45's.

http://www.nicoclub.com/FSM/Q4...l.pdf

[qship96]

HMMMMMMMMMM- There is some type of headlamp control box{small, plastic, about the size of a pack of cigarettes, behind the pass. side turn signal lamp housing-only visible when you remove the headlight and turn signal lamp housing-wonder what it is????

[Infinitiguy19]

If you have a Q45 with day time running lights then thats where the control for the day time running lights is near according to the 1996 Q45 service manual.

Your car might be a Canadian car.

But what do you think of the current headlamp relay?

[qship96]

The solder joints look ok- the part seems pretty bulletproof, as mine has 245K miles on it, even with my slightly over-wattage bulbs installed.

I will look at that module behind my lights next time I am in there- I do not have DRL, so I am puzzled as to exactly what it is- I thought it said headlamp sensor on it, but maybe not,its been awhile since I have seen it.

[Q451990]

Does it work? They rarely fail in the Q45... very common failure on the J30 though.

I don't see anything particularly scary in the pictures, but that's not really the test...

Heath

[Infinitiguy19]

The solder joints look ok- the part seems pretty bulletproof, as mine has 245K miles on it, even with my slightly over-wattage bulbs installed.

I will look at that module behind my lights next time I am in there- I do not have DRL, so I am puzzled as to exactly what it is- I thought it said headlamp sensor on it, but maybe not,its been awhile since I have seen it.

My worry is about the wires (Harness) being able to handle the higher wattage bulbs.

And that module behind the headlights has me puzzled as well. But if its OEM it will have part number on it which will help identify it.

Does it work? They rarely fail in the Q45... very common failure on the J30 though.

I don't see anything particularly scary in the pictures, but that's not really the test...

Heath

I plan on trying it out but I am trying to solve the problem where the interior lights dim when the brake pedal is pressed for the first time when the ignition is on or if the car is running. And like I said after two times that the brake pedal is pressed the interior and exterior lights no longer dim. The "Stop lights inoperative" message has appears randomly sometimes but then goes away while driving.

Alternator and battery is fine and I have load tested the battery and checked the alternator as much as possible except for the ripple test.

So things to check on my list are Tail lamp sensor which was said to be good when I took pictures of the circuit board and posted them a while ago. And of course the headlamp relay.