I have a late 80s model golfcart 36 volt system with 6 cabels can you tell me how to hook them up

I don't know but taking a guess, I would say the 48 volt supply is reserved for the drive motor for increased efficiency but for the "car" parts that voltage would be far too high - the majority of the world's market using a 12 volt supply for ancillary equipment, providing vehicle manufacturers the opportunity to buy in such equipment at keen prices rather than producing special high voltage items at a huge cost.

If the headlamps work ok then 9 volts will be the correct voltage for them and somewhere in the circuit there will be an led driver that reduces the voltage and probably limits the current...

Depends on what voltage you want. Take 3 twelve volt batteries and hook the up positive to positive. And the negatives to negative. You still only have twelve volts, just a lot of amperage. Hook the same 3, positive to negative. Then you have 36 volts.

On late 80s, early 90s Fords, the throttle position sensor going bad will drain the battery. If You have an amp hooked up, the internal switch could be going bad, causing it to pull power. With the switch off, loosen the hot cable, and unhook the amp, see if the cable sparks when you touch it to the battery post. If it still does, keep unhooking stuff and pulling fuses till it stops arcing.
This will let you know what is draining the battery. Also check for frayed wires,

In Series

In most cases you will have to drill it.
There are videos on Youtube that show how its done.
Most all Ford locks in the late 80s and early 90s are the same style.

LOOK ON SIDE OF THE ENGINE NEXT TO DIRECT IGNITION SYSTEM COIL PACK OR LOOK ON TRANSAXLE END OF THE CYLINDER HEAD.THAT WHERE GM PUT OIL SENDING UNIT IN THE LATE 80S AND EARLY 90S.

Chec here the MUSTANG FIRING ORDER

Below are the firing orders for 5.0L, 4.6L, 3.8L, and 2.3L late model Mustangs. Remember to be very careful when checking your firing order because the ignition system on your car runs on very high voltage. Do not remove spark plug wires from the distributor or spark plugs while the engine is running.
Firing order sequences:
V8's 1-3-7-2-6-5-4-8
V6's 1-4-2-5-3-6
2.3L 1-3-4-2




Hope this help (remember comment and rated this) TY for using Fixya.

Depends on how many batteries were in series when you hooked it up. If you supplied the full possible 36 volts, there is no telling what you fried.

Start by checking the fusible links on the fire wall and all fuses.

Lots of luck

look at battery and idenify neg and poss posts if the cabel from neg post is connected to the starter solenoid then it is poss earth no way can both be connected to ground it would cause a dead short