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fiero charging system by dthami22
Started on: 07-15-2014 10:54 PM
Replies: 8 (317 views)
Last post by: dthami22 on 07-17-2014 05:29 PM
dthami22
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Report this Post07-15-2014 10:54 PM Click Here to See the Profile for dthami22Click Here to Email dthami22Send a Private Message to dthami22Edit/Delete MessageReply w/QuoteDirect Link to This Post
hello,

i'm replacing the instrument cluster with new after market gauges. therefore, i won't have the alternator bulb and battery light in my charging system route. this will cause my alternator to not charge my battery. how can i create a bypass so the alternator will continue to charge my battery while using the new gauges?

thanks!
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dthami22
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Report this Post07-16-2014 03:39 PM Click Here to See the Profile for dthami22Click Here to Email dthami22Send a Private Message to dthami22Edit/Delete MessageReply w/QuoteDirect Link to This Post
does anybody have an answer for me? bump
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tshark
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Report this Post07-16-2014 03:51 PM Click Here to See the Profile for tsharkSend a Private Message to tsharkEdit/Delete MessageReply w/QuoteDirect Link to This Post
...

[This message has been edited by tshark (edited 09-08-2018).]

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NetCam
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Report this Post07-16-2014 08:47 PM Click Here to See the Profile for NetCamClick Here to visit NetCam's HomePageSend a Private Message to NetCamEdit/Delete MessageReply w/QuoteDirect Link to This Post
I'm sure somebody who knows a lot more than me will chime in, but I heard somewhere along the way that the bulb is actually inline with the charging system.
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Gall757
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Report this Post07-16-2014 09:19 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
Are you using the stock Fiero CS alternator? Then you should have the wiring for the VOLTS light. If you choose not to display it on your panel, that's OK, but you still need the light because the alternator checks the voltage on that wire to decide when to start charging. Visit the Ogre's Cave electrical section to see some diagrams and learn how the system works. I think you can substitute a resistor for the bulb, but seeing the light is useful.
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RWDPLZ
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Report this Post07-16-2014 09:31 PM Click Here to See the Profile for RWDPLZClick Here to visit RWDPLZ's HomePageSend a Private Message to RWDPLZEdit/Delete MessageReply w/QuoteDirect Link to This Post
The bulb is simply a load. All you have to do is replace it with a resistor. The 84's have a resistance wire instead of a bulb, since there is no charging light. The value in the 84 service manual is 10 ohms, +/- 1 ohm (so 10% tolerance or better). Replacing a bulb rated for 5 Watts at best, means 5 Watt or better resistor.

Definitely overkill, but it would work, and $0.89 + shipping:

http://www.mouser.com/Produ...uhR%2f0DbTCc7inLI%3d
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dthami22
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Report this Post07-17-2014 12:43 AM Click Here to See the Profile for dthami22Click Here to Email dthami22Send a Private Message to dthami22Edit/Delete MessageReply w/QuoteDirect Link to This Post
thank you everybody for the responses. the car is in fact an 84. so i just need to run the wires from the harness into the resistor? i have the diagram for the left and right harnesses that go into the original cluster.
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phonedawgz
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Report this Post07-17-2014 05:18 AM Click Here to See the Profile for phonedawgzClick Here to visit phonedawgz's HomePageClick Here to Email phonedawgzSend a Private Message to phonedawgzEdit/Delete MessageReply w/QuoteDirect Link to This Post
Since on your 84 there was already a resistor since they had no light you can just hook it up. The resistor is already there.
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dthami22
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Report this Post07-17-2014 05:29 PM Click Here to See the Profile for dthami22Click Here to Email dthami22Send a Private Message to dthami22Edit/Delete MessageReply w/QuoteDirect Link to This Post
thank you. where is this resistor located? i see the left and right wire harnesses but dont see a resistor. thanks
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