1999 Honda Passport 2 same fuses, keep blowing

BGTLTM

MEMBER
1999 HONDA PASSPORT
6 CYL
4WD
AUTOMATIC
160,000 MILES

How can I find what is causing both the horn and foglights fuses to keep blowing. As soon as I replace the fuses and turn the key, both fuses immediately break.

Thanks,
Tom

Thursday, November 19th, 2009 AT 6:47 PM

1 Reply

KHLOW2008

MECHANIC
41,815 POSTS

Hi Tom,

The horn fuse is shared by the following :

Alarm & relay control
Security horn
Datalink connector
Alternator ( 3.2 L). This is the most likely cause as it is affected by the ignition switch power. Try unplugging the alternator wire connector and testing.

The fog light fuse is independent of the ignition switch and I could not find any relations between them so it is surprising that the ignition switch is affecting it. Unplug the fog light relay and retest.