99 Ford F-150 won't start loses power when engaging.

Asked by Nov 29, 2015 at 09:05 AM about the 1999 Ford F-150

Question type: Maintenance & Repair

Truck drove fine then next time I went to
start it nothing. When key is in on position
lights radio dash all light up but when I
engage key to start it loses power no lights
radio dash. It makes a clicking noise coming
from passenger side under hood around
battery. While attempting starting it I notice
falling sparks. They fell by RHS tire from
underneath the hood could smell burning
electrical. My local shop tried fixing it with no
luck so things like battery cables starter etc
have been checked. Any ideas??

4 Answers

8,030

WTF ? you have flying sparks, a shop attempting to repair? But dont have an estimate for complete, proper repair? You describe battery cable and fusible links, as well as power distribution cable related issues. the cable ends must be able to carry the current, be clean and tight, not full of resistance. Back track to that, and lets not take any parts off youir list just yet.. have the inspections, prechecks, circuit protections, and the battery itself, its service, its being filled, cleaned, and passing tests.? does that somehow pass as good to use? I am next going to suggest inspection of the starter relay. And see if the tech who "worked" on it, has any suggestions from what he learned or noticed.

8,030

A 12v test light is 4 bucks, you can check power at each point leaving the battery. a battery brush, baking soda, volt meter, wrench, screwdriver. it can all be rounded up for 10 bucks nowadays. cable ends are like 2 bucks each, see where this is going? Battery tests are free at places trying to sell you a new one. A skilled tech and his equipment costs more, tests are run, maintenance and parts replaced to achieve basic function, lets say. then, tests that prove you need a battery, relay, cables, or their ends, or have some part or problem that would cause arcing. I would expect an answer in the first half hour.

17,870

Sparks flying indicates a short circuit. A visual check should show burnt wires or components. Trace the positive wire from the battery to the location where you saw sparks flying and look for damage.

8,030

Right, but it does so during cranking only, the sparks are by the right tire under the hood, and the problem has discharged the battery, they hear the starter relay. trying to connect with low voltage. The more I reread this, the more I think the shop needs to look again. What operates only during cranking, is "not connected" when the switch is off, even though the positive cable is always connected to the relay. they "state" that cables and starter have already been checked, and they are ok? You hear the relay flutter, but on these trucks you cannot see it. The cables that were "checked" to be OK, go to and from it. It is covered by a sight shield and no longer mounted at the fender, But around the battery at the rear of the engine compartment. The vehicle was fine/ then it wasn't. Then checked by a shop, then they asked us, did it drive home? or is it sitting with a dead battery (causing flutter sound) outside the shop? Or is there unmentioned information? BECAUSE THESE STATEMENTS DO NOT ADD UP. The battery, relay starter, and cables are all at the same point viewing it from the side to see sparks, the battery is discharged if the relay flutters, and the burning smell indicates a fire occurring ( but only when attempting to crank) This system needs step by step disassembly, tests, inspections and a correct diag, not to be returned to the customer. Now they have to go step by step telling the rest, or check every part for improper assembly, sticking, shorting, burning, poorly connected, etc. It is important because they are going to lose the rig in a fire, and insurance of the shop or the vehicle owner may not save them. They need to find it, tell the rest, or, disconnect and tow it back there. It just seems their information has a pretty large hole in the story, Just sayin.

Your Answer

Add photo

Related Questions

F-150

Looking for a Used F-150 in your area?

CarGurus has 210,526 nationwide F-150 listings starting at $1,499.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 7,660
#2 dandyoun
dandyoun
Reputation 4,300
#3 tennisshoes
tennisshoes
Reputation 2,680
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,816 Great Deals out of 168,315 listings starting at $1,950
Used GMC Sierra 1500
856 Great Deals out of 66,786 listings starting at $1,995
Used Dodge Ram 1500
441 Great Deals out of 11,343 listings starting at $1,000
Used Ford F-250 Super Duty
353 Great Deals out of 47,750 listings starting at $1,795
Used Toyota Tundra
515 Great Deals out of 33,555 listings starting at $3,400
Used Toyota Tacoma
505 Great Deals out of 39,601 listings starting at $2,900
Used Ford Mustang
376 Great Deals out of 47,164 listings starting at $1,999
Used Ford F-250
470 listings starting at $3,975
Used Chevrolet Tahoe
568 Great Deals out of 27,717 listings starting at $1,999
Used Ford Explorer
816 Great Deals out of 75,234 listings starting at $750
Used Ford Ranger
193 Great Deals out of 6,053 listings starting at $1,299
Used Jeep Wrangler
283 Great Deals out of 18,785 listings starting at $2,995

Used Cars For Sale

2017 Ford F-150 For Sale
15 Great Deals out of 125,402 listings starting at $18,490
2016 Ford F-150 For Sale
143 Great Deals out of 22,929 listings starting at $18,800
2015 Ford F-150 For Sale
185 Great Deals out of 7,531 listings starting at $10,999
2014 Ford F-150 For Sale
367 Great Deals out of 12,489 listings starting at $7,995