electrical question
10-07-2007, 08:06 PM
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electrical question
Hey everybody,
I have noticed that on my 2 ctd's that as it gets colder, when you start them up and the headlights are on, that the voltmeter will momentarily drop a few volts and the headlights will dim. Then the voltmeter will jump back up to normal and the headlights will brighten up.It usually does this for about 5 mins or so. My Dad's 95' and my 04.5' and my 92' all do this same thing. Is it the regulator cycling or what? I was just curious and wondered if anybody else experiences this phenomena?! Thanks!!
ez
I have noticed that on my 2 ctd's that as it gets colder, when you start them up and the headlights are on, that the voltmeter will momentarily drop a few volts and the headlights will dim. Then the voltmeter will jump back up to normal and the headlights will brighten up.It usually does this for about 5 mins or so. My Dad's 95' and my 04.5' and my 92' all do this same thing. Is it the regulator cycling or what? I was just curious and wondered if anybody else experiences this phenomena?! Thanks!!
ez
10-07-2007, 08:22 PM
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the light only comes on before you start it, and should turn off after the engine starts. the light doesn't cycle, but i think the actual heater grid turning on and off is what dims the voltage. the light should only go on when its below 40 or so, at least thats when mine goes on.
10-07-2007, 08:43 PM
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the light only comes on before you start it, and should turn off after the engine starts. the light doesn't cycle, but i think the actual heater grid turning on and off is what dims the voltage. the light should only go on when its below 40 or so, at least thats when mine goes on.
ez
10-07-2007, 09:33 PM
#7
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The charge-air heater(s) draw 220 amps when operating. You're stock/OEM alternator puts out 160 amps when at the right engine RPM.
Do the math . . . . ..
I can't recall the exact temperature (60*F ?), but when it's cooler outside, the heaters will cycle till the engine coolant temperature comes up. It's an emissions thing.
Many are concerned about it none the less and feel they must disconnect them. Their trucks run just fine albeit perhaps with a little initial white smoke.
The wait to start lamp allows the aforementioned charge-air heaters a chance to warm up correctly before you hit the starter. 
Do the math . . . . ..
I can't recall the exact temperature (60*F ?), but when it's cooler outside, the heaters will cycle till the engine coolant temperature comes up. It's an emissions thing.
Many are concerned about it none the less and feel they must disconnect them. Their trucks run just fine albeit perhaps with a little initial white smoke.
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10-08-2007, 06:46 AM
#9
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The charge-air heater(s) draw 220 amps when operating. You're stock/OEM alternator puts out 160 amps when at the right engine RPM.
Do the math . . . . ..
I can't recall the exact temperature (60*F ?), but when it's cooler outside, the heaters will cycle till the engine coolant temperature comes up. It's an emissions thing.
Many are concerned about it none the less and feel they must disconnect them. Their trucks run just fine albeit perhaps with a little initial white smoke.
The wait to start lamp allows the aforementioned charge-air heaters a chance to warm up correctly before you hit the starter.
Do the math . . . . ..
I can't recall the exact temperature (60*F ?), but when it's cooler outside, the heaters will cycle till the engine coolant temperature comes up. It's an emissions thing.
Many are concerned about it none the less and feel they must disconnect them. Their trucks run just fine albeit perhaps with a little initial white smoke.
The wait to start lamp allows the aforementioned charge-air heaters a chance to warm up correctly before you hit the starter.
Jim
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