Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

What activates the light in our engine bay?

Thread Tools
 
Search this Thread
 
Old 08-01-2003, 01:33 AM
  #1  
zehnd
Addict
Rennlist Member

Thread Starter
 
zehnd's Avatar
 
Join Date: Jun 2002
Location: Canada
Posts: 1,755
Likes: 0
Received 0 Likes on 0 Posts
Default What activates the light in our engine bay?

Just as the topic asks, what turns on the light in our engine bay. Mine does not work. I do have a new bulb in there.
Old 08-01-2003, 01:38 AM
  #2  
Macfreak007
Three Wheelin'
 
Macfreak007's Avatar
 
Join Date: Aug 2003
Location: Louisville, Ky/Altanta, GA (Georgia Tech)
Posts: 1,815
Likes: 0
Received 2 Likes on 2 Posts
Default

you have the headlights turned on for it to work, or at least that is what happens w/ my car.
Old 08-01-2003, 01:48 AM
  #3  
zehnd
Addict
Rennlist Member

Thread Starter
 
zehnd's Avatar
 
Join Date: Jun 2002
Location: Canada
Posts: 1,755
Likes: 0
Received 0 Likes on 0 Posts
Default

Didn't work, mine must be pooped. Any other ideas.

Thanks
Old 08-01-2003, 02:14 AM
  #4  
Tyler951
Instructor
 
Tyler951's Avatar
 
Join Date: Jul 2003
Location: University of Oklahoma (Norman)
Posts: 116
Likes: 0
Received 0 Likes on 0 Posts
Default

I think mine only works when the engine is running... or the lights are on... i dont know for sure... some electrics with these cars are crap shoots right?
Old 08-01-2003, 02:15 AM
  #5  
brrt50cal
Addict
Rennlist Member
 
brrt50cal's Avatar
 
Join Date: Dec 2002
Posts: 4,062
Likes: 0
Received 0 Likes on 0 Posts
Default

Yea mine only works with the engine running...
Old 08-01-2003, 02:20 AM
  #6  
zehnd
Addict
Rennlist Member

Thread Starter
 
zehnd's Avatar
 
Join Date: Jun 2002
Location: Canada
Posts: 1,755
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally posted by brrt50cal
Yea mine only works with the engine running...
Nope, that didn't work either.

Just curious, if it only works when it's running, how do you work on your car when it's broke down.

I'll have to see if the wire is crimped some where. Thanks guys.
Old 08-01-2003, 02:23 AM
  #7  
89magic98
In the Sink
Rennlist Member

 
89magic98's Avatar
 
Join Date: May 2003
Posts: 10,981
Likes: 0
Received 97 Likes on 75 Posts
Default

On my car, the wire to the light is broken right where it is zip-tied to the hinge for the hood.

Over time, opening and closing the hood bends and unbends the wire, I imagine all of them break given enough time.

Perhaps the wire is broken in your car, but the insulation for the wire is intact.

I am going to solder in a fresh piece of wire at the bending point tomorrow night.

-Kevin
Old 08-01-2003, 02:37 AM
  #8  
IceShark
Nordschleife Master
 
IceShark's Avatar
 
Join Date: Jun 2001
Location: Minneapolis, USA
Posts: 5,159
Likes: 0
Received 1 Like on 1 Post
Default

Don, The underhood light will work as long as you at least have the parking lights on. Engine doesn't have to be running or keys in ignition. I'm not sure about the '83 switch but the later cars had a mercury switch built into the socket base. That is why it is so long compared to other sockets. So check yours and see if it about a half inch longer than it should be, then you have a mercury switch.

Mercury switches don't usually fail unless you bash them open and drain the mercury out so I would suspect a broken wire at the hinge area or dirty bulb socket.

BTW, you wouldn't believe how much underhood light you get when you put in a 50 watt halogen bulb in that socket. It is really amazing.
Old 08-01-2003, 02:41 AM
  #9  
89magic98
In the Sink
Rennlist Member

 
89magic98's Avatar
 
Join Date: May 2003
Posts: 10,981
Likes: 0
Received 97 Likes on 75 Posts
Default

Originally posted by IceShark
BTW, you wouldn't believe how much underhood light you get when you put in a 50 watt halogen bulb in that socket. It is really amazing.
Is this the maximum safe wattage bulb that you can use? I assume that if you recommended this, you must have tried it. I guess this is only really pulling ~4 amps though the wiring, so maybe this is OK.

-Kevin
Old 08-01-2003, 02:49 AM
  #10  
Randy_J
Three Wheelin'
 
Randy_J's Avatar
 
Join Date: Aug 2002
Location: PNW
Posts: 1,599
Likes: 0
Received 1 Like on 1 Post
Default

S2Nut says:
"
its like a fridge if you open the hood fast enough you might see the little german turning the light on"
Old 08-01-2003, 03:01 AM
  #11  
zehnd
Addict
Rennlist Member

Thread Starter
 
zehnd's Avatar
 
Join Date: Jun 2002
Location: Canada
Posts: 1,755
Likes: 0
Received 0 Likes on 0 Posts
Default

I replaced the wire, and I know there is power there because I popped a fuse. The light socket is screwed. I'll have to find another one. Thanks
Old 08-01-2003, 03:50 AM
  #12  
sweanders
Race Director
 
sweanders's Avatar
 
Join Date: Jun 2002
Location: Sweden
Posts: 11,252
Likes: 0
Received 2 Likes on 2 Posts
Default

There is a small switch that is is spring loaded, it extracts when the hood is opened and lights the bulb..

I'll try and find a pic of it, hang on!
Old 08-01-2003, 04:23 AM
  #13  
led
Three Wheelin'
 
led's Avatar
 
Join Date: Aug 2002
Location: San Juan, PR
Posts: 1,598
Likes: 0
Received 1 Like on 1 Post
Default

On my car it turns on when you flip the turn signal switch to one side, can't remember which side though.
Old 08-01-2003, 09:35 AM
  #14  
IceShark
Nordschleife Master
 
IceShark's Avatar
 
Join Date: Jun 2001
Location: Minneapolis, USA
Posts: 5,159
Likes: 0
Received 1 Like on 1 Post
Default

Kevin, 50 watt would be the absolute maximum you would want to run underhood. I've been running a sample bulb in there for a few months and it seems OK. It would probably be safer to run a 35 watter in there. The issue is wire gauge size - it is a 0.5mm wire and depending on how long the run is that is a bit small for a 50 watt load.

Luis, when the car is off and you flip turn signal to right you engage the parking light function for that side. The underhood light is somehow tied into the right side, but I have never tried to figure out how.
Old 08-01-2003, 03:17 PM
  #15  
Waterguy
Three Wheelin'
 
Waterguy's Avatar
 
Join Date: Aug 2002
Location: Vancouver, BC
Posts: 1,388
Likes: 0
Received 3 Likes on 3 Posts
Default

Ice Shark is, once again, the MAN! The underhood light draws power off connector M33 of the main circuit board (85.5 and later models.) This is the same terminal that powers the right hand tail light, but not the left hand tail light. It therefore gets power whenever the parking lights or fancy euro right-side-only parking light functions are on, independent of the ignition key.


Quick Reply: What activates the light in our engine bay?



All times are GMT -3. The time now is 08:23 PM.