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Reverse problem

Tiny
LCJR2
  • MEMBER
  • 2004 MAZDA RX8
  • 153,079 MILES
Used 2004 mazda rx-8, I test drove it, inspect the basics and drove fine so I bought it. Not even a week and the car isn't able to go into reverse.I push down on the shift knob but as soon as I put it into the reverse gear the car turns completely off. Battery is good all interior lights work. Notice the ignition fuse was blown so I put another 15a fuse for the ignition fuse and the car started. Once again tried going into reverse and it blow the ignition fuse again. The gears work fine its a manual transmission, it drives, the car runs, but just doesn't want to engage into the reverse position. I have no clue any ideas what the problem could be?
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Thursday, May 30th, 2013 AT 7:56 PM

11 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You have something shorting out blowing the fuse. Cold be abad wire, among other things. Have a local pro look at it
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Friday, May 31st, 2013 AT 7:13 AM
Tiny
LCJR2
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  • 6 POSTS
Any specific wires to check?
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Friday, May 31st, 2013 AT 7:18 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
What fuse blows? It would be that circuit that you would check and it cold be anything underdash or engine compt depending on whther motor mounts are good etc.
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Friday, May 31st, 2013 AT 7:34 AM
Tiny
LCJR2
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  • 6 POSTS
Its the ignition fuse that keeps blowing. Everything else seems to be fine. I'm able to drive the rx-8 but when I try to go reverse, ignition fuse blows. Can I use a dmm to find the short and if I can, how?
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Friday, May 31st, 2013 AT 7:41 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Give me a number of the fuse in the fuse panel an dwhere it's located. Dash/underhood then you will need a circuit breaker to install wher effuse is then you dvm you can probe one of the wires, but also get a compass and run it across harness if you see it go screwy look there. But this will be very hard to find. Is this a stick or automatic because it could be something in trans.
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Friday, May 31st, 2013 AT 7:47 AM
Tiny
LCJR2
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  • 6 POSTS
The number is 22 on the fuse panel it is underhood next to the battery. Its a 15a fuse and the car is a manual transmission.
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Friday, May 31st, 2013 AT 8:11 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
That's the fuel pump circuit and on the diagram i'm sending it should have a 20 amp fuse not a 15 so try that first/ even on my chart it says 22 should be a 20 amp the if it still blows then check your relays first then you'll see a resistor there. See if that is shorting out. Then see if the ground on left rear wheelwell is connected and not loose or dirty. Do the easy stuff first. You can replace the relay with a like relay to test it. The red white wire off the second relay goes to the pump but it may only be the wrong fuse in there.
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Friday, May 31st, 2013 AT 8:19 AM
Tiny
LCJR2
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  • 6 POSTS
I'm sorry I meant put number 20, double check and its this one.
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Friday, May 31st, 2013 AT 9:05 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Ok pull these fuses one at atime to further see what circuit it is. The #20 fuse goes to igniton switch. After you pull these fuses things won't work like radio etc. If it still does it with the fuses then it's either the wire going to ignitionswitch, the switch itself or there is a relay that the switch turns on to send power to the fuses shown. Once you find out what circuit it is then we can go from there. Also if your cigaretter lighter is pushed in or look for coins in it as that can cause this as well.
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Friday, May 31st, 2013 AT 10:06 AM
Tiny
LCJR2
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  • 6 POSTS
Ok I test the fuses the lights of the interior works that's it put key in at acc or on position and no power because the that ignition fuse is blown. Once I put a new 15a fuse in the #20 put key in and it turns it on working normally. But still as soon as I go try to go in reverse the same fuse which is #20 keeps blowing.
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Friday, May 31st, 2013 AT 9:17 PM
Tiny
HMAC300
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I forgot to send the pic of what fuses to pull one at atime sorry. That will break down which circuit is giving you problems if it's not the ignition switch. Re read my last reply as well. Ok now check these fuse by pulling them out one at atime and driving in reverse. If the car continues to run that is the circuit that is causing the problem
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Saturday, June 1st, 2013 AT 5:48 AM

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