20 Most Recent 1991 Ford F350 - Page 8 Questions & Answers

Headlight switch could be the culprit. Your dash lights go through it to be able to get bright/dim function for night/day mode.

should be on fire wall on right side its pretty good size

This is the 170 hp engine in the falcon https://www.automobile-catalog.com/make/ford_usa/falcon_usa_2gen/falcon_usa_2gen_futura_sports_sedan/1964.html https://www.blueovaltech.com/history/1964-ford-trucks.php

I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manuals

Have a load test done on the batter to check for failing cells. For diesels to start any thing less than a fully charged battery good battery is a waste of time as the engine needs fast RPM to heat the air to ignite the fuel and slow rpm's just doesn't cut it.

You probably need a new water in fuel sensor. I assume you have drained it

Anything between the switch and the wiper motor . Does it have power and ground to the motor or motor connection ? Work your way back from the motor connection . Make sure motor is tight and has a good ground .

Bad door switch located under the latch.

Your Power Train Contol Module may be bad.

Generally when a diesel has trouble starting there is always a possibility low compressions are the cause if heater plugs weren't the problem. Some engines are more prone to this than others, the worst and least offender in my experience were both Ford. Usually if the heater/pre heat is a problem and everything else is ok then removing the air cleaner and blowing hot air directly into the intake will provide a normally starting engine. Many engine "specialists" will say injector condition plays little or no part in the starting stakes - not true! Apart from any other considerations, something must be done about a non-starter and it is quicker, easier and cheaper to check the easy possibilities before sending the engine for overhaul. A good battery and starter is essential to provide the best possible cranking speed and then ensure the injectors are in good order and that means removing them and sending them to the diesel specialist...

Sounds like a faulty headlight switch, or an issue regarding the Daytime Running Lights, Check those out!

If you take it to the dealer they can remove the limit, you might be able to do this with an autotek, bafx diagnostic tool. Check Amazon they have many that classify as advanced. Might be cheaper to go the dealer route though. Did the same on the 2017 F350

Just drive it. Sometimes it just takes a little time for the system to update

The solenoid on a ford should be under the hood close to the battery on the fender area. Follow the positive battery cable and it should lead you to the spot.

There's a module on top of the transmission the connections maybe corroded or that module has failed

hello u'd need a proper manual for this in my opinion like there are plenty of dealers and online shops that deal in those.. you can get some free at reliable-store and it;s actually really illustrative

check if any interior lights are left on when leaving vehicle, if none found will need to eliminate other causes, is the battery holding charge, which is different to being drained, is the alternator charging rate ok , start there and see how things are

Check the end of the fuel rail where the lines go in. I hope this helps, take care.

Relay in the under hood fuse box for trailer running lamps / park lights .

Go to ford owners.Com register then download the manual for free then go to roadside emergencies and your power distribution box diagrams and fuse box diagrams are in there and the fuse values and relay locations you can put this on your computer or phone and you can print it out and now you will always have it when you need it good luck stephen