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Old 04-05-2004, 10:32 AM   #1
bleuquila
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Unhappy why do my Morettes keep burning out bulbs?

it's getting really frustrating - the first pair of bulbs I put in my Morettes, low-beams (H7) lasted for less than a month! They blew out within a week of each other. I hadn't pulled the DRL module, so I did at that point, and put new bulbs in. Well, it's been a week, and already one has blown out. I don't know what to check, or have any idea what there could be about my lights that is so bad? Suffice to say I'm loathe to spend $50 on new bulbs that last a month or less.

I'm not using the Morette wiring harness, they are wired with a suv lights harness with two relays, one each for high and low beams. Low beam relay is grounded to chassis, high beam to the high beam switched ground. Nice solid wire, good connections so far as I can tell, they operate perfectly ... what could the issue be?
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Old 04-05-2004, 11:34 AM   #2
Mulder
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What type and wattage of bulbs?
With the Morettes you really don't need an aftermarket harness, since the high beams are already getting battery power, and if you directly ground the low beams and add a ground-switching relay for the highs you will have 99% of the benefit of the $$ harness for very little cost.
Someone posted a pic recently of an SUVlights harness that had burned out, there were diodes and resistors in there serving some unknown function. Maybe the way they're wired is somehow doing something evil to the bulbs.
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Old 04-06-2004, 11:55 AM   #3
bleuquila
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Well, the reason for the upgraded harness - I bought the lights off a guy who was using 100W bulbs in the high beams, and the connectors were melting. So, he sent me the Morettes, and the suvlights harness which he never installed. The harness didn't match the 9007 plugs, so I had to do some hacking. I emailed the suvlights guys for help, (they were incredibly unhelpful) and while they mentioned some weird diode business I didn't see anything like that, it seemed fairly straightforward.

I've been using 100W in the high beams (no problems with them) and added 100W bulbs from rallylights.com to the low beams. When those burned out, I put back the stock 55W bulbs (eurolight, or something like that) in the low beams, and the first one only lasted a week, compared to a month of use from the more heavyduty 100W bulbs I originally was using.

Anyway, if it's a problem with the harness, what sort of steps would I take to troubleshoot that?
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Old 04-06-2004, 12:05 PM   #4
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My guess would be that your headlights let in moisture and when the hot bulb comes in contact with moisture it burns out.
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Old 04-06-2004, 12:28 PM   #5
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Ok, now I remember the discussion about wiring your lights for the 100W bulbs.
I haven't personally seen one of those harnesses so I don't know how they are wired. What you might want to do is as long as you're using 55W bulbs is to disconnect the low beams from the SUV harness and use either the stock wiring, or the stock power and a direct ground, and see what happens.
Also the point about moisture in the light is a valid one, might want to take a close look in there. Look at the burned-out bulbs and see if there is any sign of deposits or residue on the outside glass.
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Old 04-06-2004, 01:10 PM   #6
PARANOID56
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Also, make sure you are not touching the bulbs glass part.
Shane
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Old 04-06-2004, 02:00 PM   #7
bleuquila
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alrighty, I'll look more closely for moisture, but I don't believe there's any condensation on the inside of the headlights. When I installed the bulbs the first time I was very cautious handling them, wore rubber gloves even. The first bulb that went, the metal filament just looks like a tiny piece of it went missing, the second bulb actually looks like it exploded, the glass is all discolored.

As far as the wiring harness, I have it all drawn up, as a matter of fact - here. I forgot the inline fuse on the battery line, but other than that there are no other resitors or diodes or anything.

The second 55W bulb hasn't gone yet, but perhaps if it does what I'll do is get two new bulbs and wire the passenger side off the stock power source, and keep the driver's side on the suvlights relay... and, uh, see what happens. That's about all I got.
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Old 04-06-2004, 02:57 PM   #8
PARANOID56
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the diagram does not look right. why do you have the low beam taped off? you need that to signel the lowbeams to come on.
?
Shane
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Old 04-06-2004, 04:27 PM   #9
bleuquila
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uhm....nope. switched ground system, familiar with it? The center wire gets 12V when the lights are turned on (no DRLs) and the relay is directly grounded to the chassis. The wiring works fine, just having bulb issues.
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Old 04-07-2004, 02:54 AM   #10
wrxecution
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dude you went through alot of trouble hooking them up you didnt have to go through its alot easier than that. I'll post a pic up of how i wired mine in and i havent blown a bulb in almost 5 months
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