erniek70
12-21-2024, 12:58 PM
I have an older Mk IV Roadster. I did not build the car....just chasing gremlins'
The only way to power the fan, is a battery connected manual switch in the dash (then powering the relay, etc.). There is no temp/thermostat switch (ex. FF5 P/N 13127 185F fan thermostat).
When I turn on the fan, it throws off readings on my other gauges. The fuel level may drop by approx. 50%, and the voltmeter drops from 14.4V, to around 12V.
First question, is this normal? It appears all of the gauges receive their power, daisy chained off of the in dash manual fan switch. I really want to fix this, as I find it quite annoying. I have checked the alternator...it's a consistent 14.4V output, whether the fan is running or not. Obviously this is normal
Rewiring any of the gauges may prove difficult....I cannot see anyway to remove the dash, without removing the body, and there is not much slack on the wiring, if panel remove the gauges 1 by one. Any ideas? I thought of running a wire from the alternator, skipping the fan switch, and then provide power the the fuel gauge off the the alternator (which wire colors power the gauge?).
Alternatively, I am thinking of abandoning the manual switch (leave it in the dash, just always have it off), and adding the thermostat instead. I am hoping, then, when the fan comes on, it will not affect the accuracy of my gauges.
Thoughts? Anyone else seen this weird gauge behavior before? Just want to get this annoyance behind me.
The only way to power the fan, is a battery connected manual switch in the dash (then powering the relay, etc.). There is no temp/thermostat switch (ex. FF5 P/N 13127 185F fan thermostat).
When I turn on the fan, it throws off readings on my other gauges. The fuel level may drop by approx. 50%, and the voltmeter drops from 14.4V, to around 12V.
First question, is this normal? It appears all of the gauges receive their power, daisy chained off of the in dash manual fan switch. I really want to fix this, as I find it quite annoying. I have checked the alternator...it's a consistent 14.4V output, whether the fan is running or not. Obviously this is normal
Rewiring any of the gauges may prove difficult....I cannot see anyway to remove the dash, without removing the body, and there is not much slack on the wiring, if panel remove the gauges 1 by one. Any ideas? I thought of running a wire from the alternator, skipping the fan switch, and then provide power the the fuel gauge off the the alternator (which wire colors power the gauge?).
Alternatively, I am thinking of abandoning the manual switch (leave it in the dash, just always have it off), and adding the thermostat instead. I am hoping, then, when the fan comes on, it will not affect the accuracy of my gauges.
Thoughts? Anyone else seen this weird gauge behavior before? Just want to get this annoyance behind me.