Why is my Alternator getting really hot!??! Help.
#1
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Why is my Alternator getting really hot!??! Help.
Im confused, i just installed my engine in my new shell and for some reason my alternator gets really hot after hooking the battery up, even if the car isnt running.. Can you guys tell me why this is happening?
#3
talking head
there you go,, you have the Alt R field wire hooked up instead to an S signal
its to do with a change in the alt field type between s4 and s5 and subsequencent change in the s5 wiring
s4 alts have an R field wire,, and it goes to the igniton switched power ( black with white stripe )
s5 loom instead has a S wire ,, that is the alt for the s5 uses an S wire which is triggered always live from the battery
you need to pull instead a black/white wire over and plug it into the top of the T plug on the s4 alt and all will be fixed
( unless the alt is burned out already )
its to do with a change in the alt field type between s4 and s5 and subsequencent change in the s5 wiring
s4 alts have an R field wire,, and it goes to the igniton switched power ( black with white stripe )
s5 loom instead has a S wire ,, that is the alt for the s5 uses an S wire which is triggered always live from the battery
you need to pull instead a black/white wire over and plug it into the top of the T plug on the s4 alt and all will be fixed
( unless the alt is burned out already )
#4
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thank you bump start i looked in the 2nd gen archives and found the alternator thread. So i just have to run an ignition switch wire to the top of the T plug.. But do i just leave the S wire disconnected?
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#9
#10
Rotary Freak
The image in the post is slightly wrong in that it shows the L wire being fed by the DASH which is something that bugs me a bit 'cause its misleading. Slightly misleading on a series four car. That white/black wire is the excitation voltage for the alternator and should show appox 1-3vdc when backprobed with the key to ON, engine not turning over. It does not have a sole function of making the idiot lights come on when the alt is not spinning.
#11
talking head
in my first response it is assumed he already has wired that white/black L wire up as there is no change there between s4 and s5
if you hook up the black /white to top of the tee and nothing else the alt will still turn on first time you lift revs to 1500 rpm
this is how most do it in older RX changing form external reg to internal reg 12at/s4 alt
else there is complications of adding a latching relay to get the signal polarity correct at the light
if you hook up the black /white to top of the tee and nothing else the alt will still turn on first time you lift revs to 1500 rpm
this is how most do it in older RX changing form external reg to internal reg 12at/s4 alt
else there is complications of adding a latching relay to get the signal polarity correct at the light
#12
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well i can tell you guys that i fixed it... what i did was run the ignition to the top or the "T" and the bottom part of the "T" is hooked to the wire that doesnt have constant power... And it seems like its working fine to me..
#13
Rotary Freak
in my first response it is assumed he already has wired that white/black L wire up as there is no change there between s4 and s5
if you hook up the black /white to top of the tee and nothing else the alt will still turn on first time you lift revs to 1500 rpm
this is how most do it in older RX changing form external reg to internal reg 12at/s4 alt
else there is complications of adding a latching relay to get the signal polarity correct at the light
if you hook up the black /white to top of the tee and nothing else the alt will still turn on first time you lift revs to 1500 rpm
this is how most do it in older RX changing form external reg to internal reg 12at/s4 alt
else there is complications of adding a latching relay to get the signal polarity correct at the light
The top wire should be feeding the regulator/transistors but not outputting to the field until the alt is actually rotationg and the diode trio is now putting out. The diode trio feeds the field from then on.
The alt relay in the CPU then relaxes 'cause the voltage on each side of the alt relay coil is the same.
Three cheers for Casey Stoner the top MOTOGP rider (AUS).
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