Headlight issue, Anyone else see this before? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 11-12-2012, 05:49 PM   #1
Senior Member
Thread Starter
iTrader: (6)
 
Join Date: Aug 2009
Location: Charlotte, NC
Posts: 924
Total Cats: 16
Default Headlight issue, Anyone else see this before?

So this has been an issue for a few years now. Im just that lazy, but anyways. The pop up headlights on my car are tempermental. Primarily the pass side one, but occasionally the drivers side headlight will not stay down or up when the lights are turned on or off. Instead, whichever side is having the issue that day will continue to cycle up and down repeatedly. Sometimes this will last once or twice, other times it will last close to a minute, but never a terribly long time. There is no discernible pattern as to when or how long they will do this. Sometime I will even go months without a single issue.

I was wondering if anyone had any thoughts on this before I things.
Gryff is offline   Reply With Quote
Old 11-12-2012, 06:04 PM   #2
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,684
Total Cats: 555
Default

I'd say it wasn't working right. Fix it. How's that for helpful?
rleete is offline   Reply With Quote
Old 11-12-2012, 07:08 PM   #3
Senior Member
Thread Starter
iTrader: (6)
 
Join Date: Aug 2009
Location: Charlotte, NC
Posts: 924
Total Cats: 16
Default

^ nopropsforu!
Gryff is offline   Reply With Quote
Old 11-12-2012, 07:27 PM   #4
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago (Over two miles from Wrigley Field. Fuck the Cubs. Fuck them in their smarmy goat-hole.)
Posts: 26,317
Total Cats: 1,915
Default

Inside the headlight motors are limit-switches which detect when the headlight has reached the commanded position, and shut off the power to the motor.

If this switch is physically sticking in one position or the other, it will cause the headlight motor to run continuously.

Since only one headlight does this at a time, that kind of points at the headlight motors themselves rather than the upstream relay.

I'm afraid I can't find any servicing instructions for this either.
Joe Perez is offline   Reply With Quote
Old 11-12-2012, 08:00 PM   #5
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,684
Total Cats: 555
Default

If it's intermittent, I'd check grounds and power connections. Beyond that, I couldn't find anything in a casual search.


Edit: just had a thought. Check the switch in the tombstone. There may be a loose wire there.
rleete is offline   Reply With Quote
Old 11-12-2012, 08:33 PM   #6
Elite Member
 
Join Date: Feb 2008
Location: Victoria, BC
Posts: 2,322
Total Cats: 12
Default

One of my headlights used to do that. It was the motor so I just bought a used motor and swapped it out. A guy in the local miata club was an electrical school teacher and he asked if he could have a look at the old motor. I gave it to him and he was able to fix it by putting a resistor or something in one of the electric wires. This was ... 10 years ago so I'm a little foggy on it.
dustinb is offline   Reply With Quote
Old 11-12-2012, 10:33 PM   #7
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago (Over two miles from Wrigley Field. Fuck the Cubs. Fuck them in their smarmy goat-hole.)
Posts: 26,317
Total Cats: 1,915
Default

Quote:
Originally Posted by rleete View Post
If it's intermittent, I'd check grounds and power connections.
Would cause non-operation, not continuous operation.

Quote:
Edit: just had a thought. Check the switch in the tombstone. There may be a loose wire there.
Would affect both headlights at the same time. Ditto the relay.
Joe Perez is offline   Reply With Quote
Old 11-13-2012, 01:00 AM   #8
Senior Member
Thread Starter
iTrader: (6)
 
Join Date: Aug 2009
Location: Charlotte, NC
Posts: 924
Total Cats: 16
Default

Quote:
Originally Posted by dustinb View Post
One of my headlights used to do that. It was the motor so I just bought a used motor and swapped it out. A guy in the local miata club was an electrical school teacher and he asked if he could have a look at the old motor. I gave it to him and he was able to fix it by putting a resistor or something in one of the electric wires. This was ... 10 years ago so I'm a little foggy on it.
It wouldnt surprise me if this were the case, I just wanted to see if anyone else had seen this, or found a fix for it before I go looking for a new motor.
Gryff is offline   Reply With Quote
Old 11-13-2012, 01:28 AM   #9
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,107
Total Cats: 518
Default

I played with a motor on a front end damaged miata where the headlights wouldn't stay down. You might wanna check the stops, to see if it's hitting those before the motor stops. It might be worth checking the linkage as well.
curly is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
Bizarre connection issue? nick470 MEGAsquirt 1 09-30-2015 11:32 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
Odd Steering issue interestedofold Suspension, Brakes, Drivetrain 5 09-29-2015 02:42 PM
WTB 90-97 miata low profile headlight kit DonPlatt WTB 0 09-25-2015 03:57 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:36 AM.