Blown fuses at ignition

2005 FORD RANGER
1,800 MILES • 3.0L • 6 CYL • 2WD • AUTOMATIC
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FORDBLUEZ
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  • 4 POSTS
The ecm /02 sensor/and flasher light fuses blow instantly on ignition. I am pretty sure it will not start with out the pcm fuse in place. But could I try leaving out the other two and leave the ecm fuse in alone and see if it blows? And just keep going if the second one say the o2 sensor fuse does not blow. Then I should stop and back probe the fuse to the flasher switch.
May 15, 2016 at 7:54 PM
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HMAC300
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
check for a short in system it may be a wire that has rubbed bare or the O2 sensor may be causing it.
May 16, 2016 at 6:49 AM
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FORDBLUEZ
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Thank you. I went through the wiring harness, did not find any thing at all. I am going to show my little brother how to use a multi meter today I will start by checking the 02 sensor new cads were recently installed.
May 16, 2016 at 10:53 AM
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STRAILER
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
My bet is the o2 sensor they have a history of shorting out.

Here is a guide to show you what you are in for

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Let us know what you find

Best, Ken
May 17, 2016 at 7:24 PM
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