Will a starter still crank with the 90 amp fuse blown?

[brando76]

I have a 1999 270 DA. The battery switch was turned to "off" while running & blew something that i cannot find. Being told that it's possible the 90 amp fuse on the back of the starter is blown. Originally i discounted this because the starter will crank but there is no "beep" when the key is turned on & the fuel pump relay will not initiate. I have been told this 90 amp fuse goes to the ECM, EFI, & ignition, & the starter would still crank if blown? Anyone know if there is truth to that or if i should be looking for something else?

Thanks for any advice.

Brando76

 

[outlaw32]

That is a fuse link and the started will not turn if it is blown.

 

[JimG]

That is a fuse link and the started will not turn if it is blown.

I beg to differ... that fuse is for all other DC, not the starter. When the starter cranks, it draws 100's of amps.

 

[brando76]

Thanks for the input JimG. I found a fuse in stock & am going to head to the lake this weekend & try this out. Hopefully it is the only issue. I appreciate the help.

Brando76

 

[Bt Doctur]

You should also have 3 fuses in one holder on the engine, Being able to have power to the dash to operate the starter means the 90A is good if the 90A block has both a red wire and an orange wire together

 

[brando76]

Thanks Bt Doctur. Found what you've mentioned to be correct in my investigations & going through the service manual diagnostics last weekend. Unfortunately, my findings have led me to the ECM as the problem. Not getting a signal to the fuel pump relay from the ECM, not even for the 2 sec that it's supposed to upon turning the key on. Even worse, that ECM is no longer available. Only option is finding used in working order.

Anyone know where to look, other than ebay currently?

Thanks,

Brando76

 

[Creekwood]

If you turned off the battery switch while the engine was running, you probably fried the diodes on your alternator. Alternators create AC current that needs to be converted to DC current for 12V systems and battery charging. The conversion is done in the alternators with a full bridge rectifiying diode set. The diodes are easily fried when you cut the battery switch while running and all that juice has no where to go.

 

[Bt Doctur]

Have you checked the main power relays?