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Rear Accessory Socket

4 messages,  Last post on Aug 27, 2008 at 3:31 AM

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#2 of 4 by mmbetz Aug 26, 2008 (11:57 am)
Why don't you read your manual, you MORON? Page 8-47   Heh, heh, heh - I'll reply to my own post:   Because I didn't know there were TWO fuse boxes on the vehicle. When the cover of the interior fuse box lists:   1 OUTLET FR 15A Accessory Socket (Front)   21 OUTLET CTR ― ― 22 OUTLET RR ― ― But there are no fuses for 21 & 22, I have to guess they all run off fuse 1. Bad guess.   So, my new question: Should a 100W inverter pop a 12VDC15A fuse? Replies to this message: ceric (Aug 26, 2008 3:29 pm) mmbetz (Aug 27, 2008 3:31 am)
#3 of 4 Re: [mmbetz] by ceric Aug 26, 2008 (3:29 pm)
Replying to: mmbetz (Aug 26, 2008 11:57 am) When you said 100W inverter, is it average wattage or peak wattage? V * I = W (I is current => Amper) so 12V * 15A = 180W average. The fuse can handle upto 180W average wattage. (of course, to be conservative, Mazda says 120W or 100W). If the wattage exceed 180W for a few seconds, the fuse might be blown.   Current->heat->blown fuse. The problem you had could be either bad contact or blown fuse. Replies to this message: mmbetz (Aug 27, 2008 3:31 am)
#4 of 4 Re: [ceric] by mmbetz Aug 27, 2008 (3:31 am)
Replying to: ceric (Aug 26, 2008 3:29 pm) Thanks for your thoughts, ceric.   I presume the 100 W rating is nominal. It's interesting that the inverter says the input current range is 5 - 25 Amps. If the current draw can vary over that large of a range, the inverter must be capable of putting out 300 W peaks (12V * 25A). That kind of draw could certainly pop a 15A fuse. But the cell phone charger that was plugged into the inverter is rated at 0.15A - so that didn't do it.   And the other thing: Once I learned that there are TWO fuse boxes, I checked the fuse for the rear outlet. I pulled it out - it looked like it might be blown, but I don't have any replacements yet - put it back in... and now the outlet works.   It's (temporarily) still a mystery.

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