How do we lite the electric water heater run off of a battery or a generator ? and how do we lite it

Probably 2 separate problems, try this turn on the ignition switch turn the blower on high then tap on the blower motor with a hammer if it runs replace the motor, if not check for current at the blower motor plug, if yes replace the motor if no locate the blower motor resistor check for voltage using a test light, if the light lights replace the resistor, if no lite go to the blower switch if no lite there??? Think again about the fuses you checked. I hope this helps, take care.

Bit vague but I would start with the coolant. Is there any coolant in the system ? Might have caused an over-heat.
Which warning lights flashed apart from the battery ?
Check your water and oil (by "water" I mean coolant).
An over heating engine will cause all sorts of christmas tree lights to go beserk.

Generally that indication implies generator failure. Generator failure can come in multiple forms. A faulty ground will cause the generator not to charge and potentially burn it up. A severed phase wind (remember, your alternator is really a three-phase generator with a six pulse front end rectifier set) will cause the light to intermittently come on along with weak charging output. A voltage regulator failure will cause zero field current in the rotor. A brush failure will also cause a generator failure light to come on and stay on. A rectifier failure (any of the six) will cause the generator not to charge properly and turn on the MIL and generator failure indicator (looks like a battery). The condition of the battery can also cause generator failure, if the battery is defective (buckled plates, weak electrolyte, low water, etc.) it will place a very high load on the generator continuously, causing it to 'full field' the rotor which can cause the rotor to overheat and fail. Never run a generator without the battery terminals connected as this will cause it to fail quite spectacularly. Do not attempt to verify output of the generator with the battery terminal leads disconnected.

If generator failure is indeed the cause, find out why. Generators rarely fail. When they do, it usually is caused by poor ground connections, corroded battery terminals, high continuous loads, electrical faults and poorly-wired ancillary equipment, such as head units, amplifiers, inverters, etc. Always check all these out when replacing the generator. Never run a generator without the battery terminals connected as this will cause it to fail quite spectacularly.

DRY OUT CAR. DISCONNECT BATTERY FOR 10 MINUTES THIS SHOULD CLEAR TEMPORARY CODES. CONNECT EVERTHING BACK UP AND RESTART. SEE IF NEW CODES OR HARD CODES RESET. GOOGLE TROUBLE CODES THAT REAPPEAR. I'M BETTING NOT MANY WILL REAPPEAR

usually caused by failed generator. Fix the generator and other lights will also extinguish. The car should jump start, but will not stay running without a charged battery. Recommend removing the generator and take to parts store for testing. Would you like instructions for removing generator?

Fuses are under ashtray, #8 & #25 + breaker 24 are known issues but various items run off them, u need mechanic unles u know how to trace electrical.
Known issues : definately 1987-88 & also some other years :
MAKE sure your center console is closed & Latched or lite will stay on.
At nite look see if your vanity mirrors lites, or "dome" lites or trunk lites, or brake lites are on.

Section 14-02A: Generator, Integral Rear Mounted Regulator, Internal Fan Type, 95 Ampere and 130 Ampere 1996 Bronco/F-Series Workshop Manual REMOVAL AND INSTALLATION Procedure revision date: 05/18/2000 Generator, 5.0L, 5.8L, 7.3L Engines Removal

1. Disconnect battery ground cable (14301).
   

1. Disconnect electrical connectors from generator (GEN) (10346).
   

1. Remove drive belt (8620).
   

1. Remove generator retaining bolts (3).
   

1. Remove generator.
   
   
   Generator
   
   
   
   
   
   Item Part Number Description 1 — Fuel Filter Assembly
   (Part of 9K601) 2 19703 A/C Compressor 3 8146 Fan Shroud 4 10A313 Generator Bracket 5 10346 Generator 6 389706-S2 Generator Retaining Bolts (3) 7 — Heater Hose Clip 8 — Heater Hose A — Tighten to 21-29 Nm
   (16-21 Lb-Ft)

Installation

1. Install generator.
   

1. Install generator retaining bolts (3). Tighten bolts to 21-29 Nm (16-21 lb-ft).
   

1. Install drive belt.
   

1. Connect electrical connectors to generator.
   

1. NOTE: When the battery (10655) has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module (PCM) (12A650) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.
   
   Connect battery ground cable.
   

You say your test light was hooked from the negative terminal of the battery to the chassis? This is correct?
If so you don't have a short you have an open circuit.
You will have a bad ground somewhere between the battery and the engine or between the the engine and the body. Trace your grounds.
If you need more help leave a messege in "add comments" and I will help you along.

KL

You need a new alternator. The battery dies when the alternator no longer charges the battery when your car is running. Acts like a mini generator when the car is running....lights radio heat ect....

Sounds to me like an alternator/ generator issue. You can get it checked for free at a local auto parts store like Autozone or Advance respectively. Hope this helps!