Hello everyone,
A couple dumb questions for anyone that has a voltmeter installed on their car. I've been messing with the dreaded cooling system fan for a while now, and just noticed something very interesting.
When my cooling fan kicks on low, the voltage drops from normal 14.xx to a solid 12. Rev the engine and it stays solid at 12 until the fan turns off. Almost like the low speed is putting a huge load on the system.
Funny thing is, if I manually turn the fan on high (I wired in an emergency relay), voltage will maintain 14. Neither circuit pulls the engine down abnormally.
So questions are:
1. What voltages are you seeing with low speed fan on at idle in gear?
2. Does the high speed consist of both motor circuits being energized at the same time? Not enough info in the ircm schematic.
I did a search but didn't quite come up with the answers.
I've done all of the preliminary checks, grounds, koeo, fresh alternator, good battery, power cables. Might be due to my crank UD pulley. All others are stock.
Thanks,
JJ
A couple dumb questions for anyone that has a voltmeter installed on their car. I've been messing with the dreaded cooling system fan for a while now, and just noticed something very interesting.
When my cooling fan kicks on low, the voltage drops from normal 14.xx to a solid 12. Rev the engine and it stays solid at 12 until the fan turns off. Almost like the low speed is putting a huge load on the system.
Funny thing is, if I manually turn the fan on high (I wired in an emergency relay), voltage will maintain 14. Neither circuit pulls the engine down abnormally.
So questions are:
1. What voltages are you seeing with low speed fan on at idle in gear?
2. Does the high speed consist of both motor circuits being energized at the same time? Not enough info in the ircm schematic.
I did a search but didn't quite come up with the answers.
I've done all of the preliminary checks, grounds, koeo, fresh alternator, good battery, power cables. Might be due to my crank UD pulley. All others are stock.
Thanks,
JJ