Electrical problem, Additional info and questions |
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Electrical problem, Additional info and questions |
mrholland2 |
Apr 19 2012, 05:15 PM
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#1
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Senior Member Group: Members Posts: 753 Joined: 7-September 11 From: Santa Maria,CA Member No.: 13,531 Region Association: Central California |
Okay, I am really irritated with this.
1. I cannot find a short in any wiring 2. The parking lights, which did blow a fuse no longer blow a fuse (more on this later) 3. Now the headlights do with the ignition on 4. The parking light, tail lights, and brake light on the LEFT SIDE ONLY do not work 5. Could the headlight switch be the problem? 6. I have a fuse at the battery. With electronic ignition and carb, how many amps is reasonable for that fuse? Thanks. |
Tom |
Apr 19 2012, 06:21 PM
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#2
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
20 amps for the whole car is insufficient if the headlights, running lights, engine, and associated systems are in use.
These cars will use between 20-40+ amps depending on what all is on. Engine on and running- fuel pump about 5-6 amps- more upon initial start up of the fuel pump, but goes down rather quickly, same for all motors, IE. heater blower, fresh air blower. Could be 8-10 amps upon start up, but rapidly decreases to 5-6 amps. About 100 mili seconds to steady state amperage. coil about 3-4 amps depending on the coil you are using and it's duty cycle ( percent of on time versus off time) It is on when the points are closed, off when the points are open ECU about 5 amps, mostly fuel injectors at about 12 volts/3-4 ohms (3-4 amps)but on a duty cycle of mili seconds per event versus miliseconds when off AAR about 1.2 amps constantly big ones are the headlights, 60 watters are 5 amps each continuously and the motor that operates the headlights about 5 amps each, more on initial start up Side and running lights, maybe a amp or less each side start adding these all up and your 20 amp fuse is too small. Remember the alternator puts out 50 amps for a reason, all systems may add up to near that when all are in use. In my fuse block thread there is a list of current values ( amps )that I researched, they may be a little off, but should be fairly close. I run 20 amp fuses for the two 4.0 mm wires and 15 amp fuses for the smaller 2.5 mm wires with no problems. hope this has helped, Tom |
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