Accidently put battery in backwards

XHECKTOR

MEMBER
1986 FORD F-350
6 CYL
4WD
MANUAL
200,000 MILES

I accidentally put battery on backwards and now there is no spark, but there is power to and from the coil.

Saturday, March 12th, 2016 AT 10:23 PM

5 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Check main EFI fuse as this may have blown, if all fuses are okay, you may have spiked the ECU and caused some internal damage.

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Saturday, March 12th, 2016 AT 11:49 PM

XHECKTOR

MEMBER
4 POSTS

I am not sure where the efi fuse is located.

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Sunday, March 13th, 2016 AT 3:07 AM

MHPAUTOS

MECHANIC
31,937 POSTS

It should be in the main fuse block, check your owners manual, if no good let me know and I will look further into its location

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Sunday, March 13th, 2016 AT 5:45 AM

XHECKTOR

MEMBER
4 POSTS

There is no efi it is a inline 6 is a carb unit

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Sunday, March 13th, 2016 AT 4:25 PM

CJ MEDEVAC

MECHANIC
11,004 POSTS

DIFFERENT GUY

LETS LOOK AT FUSIBLE LINKS

HIS INFORMATION IS FROM "PRODEMAND", W/ A 4.9 A "F-350" WAS NOT AN OPTION, ONLY A F-250. NEVER THE LESS, I HAVE THIS UPPER HALF OF THE CHARGING SYSTEM DIAGRAM. (I HAVE TO SCREEN SHOT THEM, AS, "PD" IS AN ONLINE PAY REPAIR MANUAL)

FUSIBLE LINKS ARE LIKE "WIRE FUSES" WHEN BLOWN, THEY MIGHT EITHER BE BURNED IN HALF, INSULATION BUBBLY, OR IF YOU GENTLY PULL ON ONE, IT WILL STRETCH OUT LIKE A RUBBER BAND (THE WIRE IS DISINTEGRATED.)

LET ME KNOW IF THIS DIAGRAM BELOW HELPS

THE MEDIC

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