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| Is this good voltage ? https://slantsix.org/forum/viewtopic.php?t=32152 |
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| Author: | 00spy [ Sat Nov 08, 2008 12:38 pm ] |
| Post subject: | Is this good voltage ? |
I am working on putting on the Hei and coil relay (Thanks Dan!) and I wanted to check the voltage first. With the key on , the votage to battery is 12.59V and alternator was 12.36V . With the engine running the battery shows 14.05V and the alternator shows 14.36V. Thanks Dave |
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| Author: | SlantSixDan [ Sat Nov 08, 2008 12:44 pm ] |
| Post subject: | |
Voltage at the battery with engine off looks good. Voltage at the alternator with the engine on looks good. Does the ammeter on your dashboard work? If not — and I'm guessing probably not; they're a weak design — run a 10ga wire from your alternator B+ (output) terminal to the battery positive terminal to reduce the voltage drop between the alternator and the battery. |
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| Author: | 00spy [ Sat Nov 08, 2008 12:58 pm ] |
| Post subject: | |
Yes the ammeter does work, it has a little movement, but barely. If I do run the 10ga wire from battery to B+ alternator , do I disconnect the wire that is on the alternator B+ terminal now. |
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| Author: | SlantSixDan [ Sat Nov 08, 2008 1:09 pm ] |
| Post subject: | |
Nope, don't disconnect any existing wires — just add the additional new one. |
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| Author: | Eric W [ Sat Nov 08, 2008 9:23 pm ] |
| Post subject: | |
Don't forget to add a fusable link on the end of the extra wire, right at the end to where you connect it. I connect mine to the stud on the starter relay. |
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| Author: | 00spy [ Sun Nov 09, 2008 5:08 am ] |
| Post subject: | |
Your talking about the wire I am connecting to the relay from a power source . I think it should be a 15a fuse if I remember what I read. Should I put one on, If I run a wire from the battery to the alternator as Dan suggested also. Thanks Dave |
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| Author: | Karasik87 [ Thu Dec 11, 2008 4:28 pm ] |
| Post subject: | |
sorry to resurrect an old thread, but i thought any voltage under 12.9 in a battery was bad. Is it different in modern cars? |
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| Author: | SlantSixDan [ Thu Dec 11, 2008 5:18 pm ] |
| Post subject: | |
A fully-charged "12-volt" battery will read 12.6 to 12.8 volts once the surface charge is knocked off (if the car's been running or the battery's been on a charger, the surface charge can be taken off by putting on the high beam headlights for 90 seconds or so with the engine off and/or charger disconnected). |
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| Author: | Karasik87 [ Thu Dec 11, 2008 6:25 pm ] |
| Post subject: | |
cool thanks |
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