.:HSTuners::

ebpda9 · 12-22-2002, 12:00 AM

my car seems to like to burn one of my passanger headlight bullb. no matter how many pairs of bulbs i change the one on the passanger side is the one that likes to go out the first. i even checked the harness for voltage and i found out that for that bulb i have 14.86V. i didn't check the other harness but the battery has the same 14.86V with the engine running. Isn't that a bit too high of a voltage ? Shouldn't it be like 13.6 with the engine running ? any ideas ? Would changing harnesses help prolong the life of the bulbs ?

94_AcCoRd_EX · 12-22-2002, 01:24 AM

Is the wiring completely stock? 14.9V is a little high I believe, but it shouldn't blow the bulb that fast. How long will a bulb last?

ebpda9 · 12-22-2002, 01:37 AM

yeah all the wireing is stock. the bulbs usually last arund 7-8 months

blind34_1 · 12-22-2002, 02:05 PM

well, maybe a current limiting resistor will help. its current that blows your bulb, not voltage. i'm prolly talking out my arse though

ebpda9 · 12-22-2002, 02:12 PM

as far as i know about electricity is that the bulb is sucking in as much aperage as it needs.

94_AcCoRd_EX · 12-22-2002, 02:46 PM

Quote:

Originally posted by blind34_1
well, maybe a current limiting resistor will help. its current that blows your bulb, not voltage. i'm prolly talking out my arse though

Too much of either can be a problem. If you have too much voltage, it will really heat things up and become a problem also.

blind34_1 · 12-23-2002, 05:41 PM

thats true, ah I've been out of school too long!

01-06-2003, 11:56 PM

voltage= current x resistance. assumig the bulb maintains the same resistance, which lights do not (their resistance changes with their temperature), the current flowing through the bulb would decrease with an increase in voltage. while 14.9 volts is a little high (only about .5V with the engine running), it shouln't be enough to burn out bulbs. check the resistance between the ground wire of the bulb and the negative terminal of the battery (be sure the take the bulb out to isolate the ground circuit). if it's much more than .25 ohms, check all the connectors on that circuit and make sure they're clean. check for any shorts in the ground circuit. you can do this visually, or do voltage drop tests between several points in the circuit and the negative terminal of the battery. a short after the bulb could bypass an intended resistance and increase current flow through the bulb without blowing fuses. just a few suggestions. they might not be worth anything.

ebpda9 · 01-07-2003, 12:27 AM

thanks for the info. i will try that

12-22-2002, 12:00 AM	#1
ebpda9 Repost Wagon Join Date: Dec 2001 Location: over here Age: 44 Posts: 17,266	Car keeps on blowing light bulbs my car seems to like to burn one of my passanger headlight bullb. no matter how many pairs of bulbs i change the one on the passanger side is the one that likes to go out the first. i even checked the harness for voltage and i found out that for that bulb i have 14.86V. i didn't check the other harness but the battery has the same 14.86V with the engine running. Isn't that a bit too high of a voltage ? Shouldn't it be like 13.6 with the engine running ? any ideas ? Would changing harnesses help prolong the life of the bulbs ? __________________

12-22-2002, 01:24 AM	#2
94_AcCoRd_EX Insomniac Moderator Join Date: Aug 2001 Location: OR Age: 43 Posts: 11,142	Is the wiring completely stock? 14.9V is a little high I believe, but it shouldn't blow the bulb that fast. How long will a bulb last? __________________ 1994 Accord EX coupe --Need hosting for your pics on HST? PM me...--

12-22-2002, 01:37 AM	#3
ebpda9 Repost Wagon Join Date: Dec 2001 Location: over here Age: 44 Posts: 17,266	yeah all the wireing is stock. the bulbs usually last arund 7-8 months __________________

12-22-2002, 02:12 PM	#5
ebpda9 Repost Wagon Join Date: Dec 2001 Location: over here Age: 44 Posts: 17,266	as far as i know about electricity is that the bulb is sucking in as much aperage as it needs. __________________

01-07-2003, 12:27 AM	#9
ebpda9 Repost Wagon Join Date: Dec 2001 Location: over here Age: 44 Posts: 17,266	thanks for the info. i will try that __________________

12-22-2002, 02:05 PM	#4
blind34_1 Registered User Join Date: May 2002 Location: IL Age: 40 Posts: 1,813	well, maybe a current limiting resistor will help. its current that blows your bulb, not voltage. i'm prolly talking out my arse though

12-23-2002, 05:41 PM	#7
blind34_1 Registered User Join Date: May 2002 Location: IL Age: 40 Posts: 1,813	thats true, ah I've been out of school too long!

01-06-2003, 11:56 PM	#8
tooslow91crx Posts: n/a	voltage= current x resistance. assumig the bulb maintains the same resistance, which lights do not (their resistance changes with their temperature), the current flowing through the bulb would decrease with an increase in voltage. while 14.9 volts is a little high (only about .5V with the engine running), it shouln't be enough to burn out bulbs. check the resistance between the ground wire of the bulb and the negative terminal of the battery (be sure the take the bulb out to isolate the ground circuit). if it's much more than .25 ohms, check all the connectors on that circuit and make sure they're clean. check for any shorts in the ground circuit. you can do this visually, or do voltage drop tests between several points in the circuit and the negative terminal of the battery. a short after the bulb could bypass an intended resistance and increase current flow through the bulb without blowing fuses. just a few suggestions. they might not be worth anything.

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