High voltage Dart -67
Found a bunch more of them and they where full off corrosion so i made new cable lugs whit better isolation
Never thought it could lead to extra resistance but now I know
It doesn't take much resistance to cause problems.
Another thing that many of us used to be too casual about is the wire routing and support. I know I used to think "why did the factory support the cables in so many places? It makes it difficult to wrench on whatever it was I was working on."
The resistance is good to understand.
@67Dart273 was one of the people who got me to think about this and do the math.
A typical multimeter can only show major problems. It may measure 0 Ohms but there can still be enough resistance to cause problems.
Voltage = Current x Resistance. (V = I x R)
Given a connection with .06 Ohms resistance
Lets say say we turn on the ignition and 5 amps flows through that resistance.
5 amps x .06 Ohms = 0.3 Volts
What happens if the ignition and field circuit draw 10 amps?
10 amps x .06 Ohms = 0.6 Volts
Doesn't seem like much?
But what happens when more things are drawing current. It could be lights, wipers, and heater fan; or could be the first minutes of the battery recharging.
30 amps x .06 Ohms = 1.8 Volts
Two bad results are happening because of the big load even though it seemed like very little resistance.
Power = Current x Voltage. That power is energy converted to heat
The other bad thing is all the equipment recieves power at lower voltage
or
if the voltage regulator sees the voltage is low, it ups the alternator's output voltage. Some things may get high votlage and other get lower voltage power.
Chrysler accepted some voltage drop in the system, but not a full volt.