Fuse Requirement???

[55 Fargo]

Hi all, I want to install on the following circuits, in-line fuses, one on the heater motor circuit and one for the wiper motor circuit.

I have an in-line fuse for the clock, will also install one for the radio, when I get a working radio.

I also have circuit breakers on the lights and ignition, these are 30 amp, I believe.

I figure 15 to 20 amp fuses should be fine for the heater motor and the wiper motor, am I figuring right.

My electrical system is a 6 volt basically stock, but I have replaced 90 % of the wiring..............Fred

[greg g]

might go 30 for the heater.

[Plymouthy Adams]

measure the resistance of the motor multiply by voltage..using peak generator output...and go a few amps for surge..say 20 - 25%

[55 Fargo]

Installed in-line fuses heavy duty 12 gauge wire types on the wiper curcuit, the heater motor circuit. I only had 7.5 amp fuses, both the heater motor and wipers still worked , did not blow the 7.5 amp fuses, but I think the 20 to 30 amp range might be best for these 2 items. I also re-wired the circuit for the headlamps, new 12 gauge wire from light switch to the dimmer switch, new wires from the dimmer switch to the terminal contact under the hood infront of the rad, and new wires to the headlamps. I used 12 gauge for the high beam circuit and 14 gauge for the low beam circuit and 16 gauge for the high beam marker light.

Before this was the following, all 16 or 18 gauge wire running to all of the lights, with the heavier wire, I would swear the front lights are way brighter.

I also cleaned up all the connections, re-routed some wire and ran a few new wires for the rear tail lights.

I also changed the connection on my right rear pigtail socket, as soon as I did that, my signal lights started working great, and they do on both sides and fronts work good too. My signal light indicator light on the dash now works, for both directions, even though it is a 1 light on the dash type, it works as it should, when the signals are used in either direction, this was not the case before...............Fred

[55 Fargo]

Hi Shel, I think 15 to 20 amps to be adequate for these 2 items. Actually on the heater motor circuit, I accidentally installed a 3 amp fuse, it did not blow, but it was only on a few seconds for a test, after some time, it would no doubt blow.................Fred ps 80 klicks, I do believe that your speaking in Metric:D