electrical problem??

[85cHeavyMetalBogger]

i'm havn trouble with my toggles or sumtin, inline fuse blowing, tach quit wrkn, elec. fan dnt wrk.. i dnt knw if theres a short some where, thats the only thing i can think of. unless switch is goin bad, but i wouldnt think it would be intermitten. why would the tach stop wrkn?? i run an hei dist.? I think i'm just gonna re-wire everything and prbly get new switches. i didnt wire it up in the first place, so i dnt really now how he has it, seems to be alot of wires all over the place..  what r some good switches to get..

[MUD HUNTER]

Certainly sounds like a short to ground... trace the circuit. Start where the inline fuse gets power... and work your way down, you'll find it eventually. Good Luck!

[Jjay78]

just take apart every ground you can find and clean it up and put it back together with some kind of electrical protectant

[MUD HUNTER]

A bad ground isn't blowing fuses...

[Jjay78]

A bad ground isn't blowing fuses...

they can, and i've seen them do it before by causing intermitent surges by being so bad

[old school truck dude]

A bad ground isn't blowing fuses...

they can, and i've seen them do it before by causing intermitent surges by being so bad

x2

If you got a bunch of stuff hooked up to a regular toggle switch, youre overloadin it. You gotta get the heavy duty high amperage kind to run your fan and all that stuff. What exactly are we workin on, and is it factory wiring or has it been modified, if so in what way?

[Eroq]

Relays!   You can get them for nothing at junkyars   diagrams are usually on them how to hook it up.. itll solve all your problems... no running full loads through the toggle switches, burns em out over time

[85cHeavyMetalBogger]

its not factory wiring, i have 4 toggles i'm using right now, one is ignition, one is fuel pump, one is wipers, and the other turns my fan on and gives my tach light power. the switch with the tach and fan quit wrkn, then wrkd then quit and so on. i have a power dist. block where i'm drawing power for my switches.  then my tach quit wrkn, thats just tied into dist i think and dnt knw why that would stop wrkn. there r inline fuses on the four wires comin off power block. so i guess i should just redo it all.  i'm not the best at the whole electrical ..

[old school truck dude]

Relays!   You can get them for nothing at junkyars   diagrams are usually on them how to hook it up.. itll solve all your problems... no running full loads through the toggle switches, burns em out over time

They do sell heavy duty toggle switches and push-pull switches that can handle the amperage. Hes got the right idea by hookin up only 1 thing per switch. The switches he has might not be heavy enough to handle the load..

What guage wire is going from batt to power block, what guage wire runnin from block to accesories, and what amperage fuse are you usin? Do you have good clean grounds from block to frame to body to battery? More than 1 ground for each might be needed  

[85cHeavyMetalBogger]

i think the switches r 20 amp, i run 20 amp inline fuses. theres a battery cable to power block then from there its like 12-16 gauge wire to switches.. the switches all have ground wire and power wires, dnt knw where they go and come from.  what i really want to knw is why the tach quit wrkn all together.. i could run without a fan but i dnt thnk so without a tach. POP goes the motor.

[old school truck dude]

Ok Im gonna take a guess n say youre workin on an 85 chevy with a small block that has hei. You actually need the fan. 16 guage is too small to run most stuff, re-do it with 12. Bigger the better. On the tach, if thats hei it gets its signal from the coil. Its just one wire and if its got a bad connection or if the coil is messed up somehow then the tach wont work. Try the tach on a different motor to determine that it actually works. If it does, try a different coil in the hei with a good connection.