Positive to Negative Ground Conversion

28 мая 2014 | Author: | Комментарии к записи Positive to Negative Ground Conversion отключены
Audi Electric Cars

Positive to Negative Ground

Make sure that the to the car is in the off position.

Disconnect both of battery terminal connections, and the battery around 180 degrees. If it is not to turn the battery, the cables be lengthened. somehow. Now connect the to the positive post on the battery.

the ground cable so that it CAN be to the negative post of the battery, but do not it now.

Ammeter Wiring

Remove the ammeter from the panel leaving wiring (or crawl on the floor with under dash and feel ) and reverse the brown wire on the back side of the ammeter. it is easy to tell if you have this correctly- if you did it correctly, it read correctly. If you didn’t get it the gauge will simply backwards. It will read when it is actually charging, and read Charge when it is discharging. If you re-reverse this, it work just fine.

No will be done.) Replace the in the instrument panel.

Electronic Wiring Reversal.

First, the front of the tachometer. If it IS marked Earth it probably IS negative already. But then, you probably be swapping your car’s system, and wouldn’t be reading

If it is marked Positive Earth, and are no other labels on the back (notice this after of the tachometer from the instrument indicating that it has been over, follow these

Remove the tachometer from the panel. Look at it carefully. a picture of the orientation of the connections for attachment screws, note etc. and. most note and carefully draw a of the orientation of the loop of white running through the plastic

This will be reversed in the instructions.

Now turn the tachometer glass face down, and on the sides of the tachometer, the bent tab of the chrome (or black) bezel. Use a fine-blade screwdriver to wedge the tachometer body and the bezel Bend them out ever-so-slightly turning and rotating the tachometer, trying to rotate the bezel from the tachometer body. Go and around. The very least of bending of these tabs is

When the bezel finally free, turn it until it from the metal body, and set aside. Carefully. very pry off/out the metal shroud and from the tachometer body if it did not off with the bezel. Be really careful with this and shroud, as it is easy to damage or both.

Also, be careful to take of whatever seals you find as replacements are not available.

Set the bezel, shroud and seals aside to carefully before later

Once the glass has been be very careful not to disturb the or leave fingerprints on the face of the Turn the tachometer face looking at the backside. Refer to the you made earlier. Locate the 2 screws holding the mechanicals of the inside the outer housing.

them carefully, slowly, they are almost free. up the tachometer in one soft hand with a tissue to prevent and complete removing the screws. The guts will fall out your tissue-covered hand, and not onto the floor.

Look at the internal wiring connections. for the small 1/2 inch long striped, diode. It is connected to the tab that provided electrical into the tachometer. Nearby, for the small green wire, to a metal lug that connects to the internal frame of the tachometer, a ground.

Unsolder these two reverse the connections and solder in Do not use any more solder if you can avoid it. heat, remove, swap/replace, let

Now the small brown diode to the ground lug, and the thin wire connects to the power in This is now correctly wired for Earth, as is the picture below.

the time to carefully dust off the face (a small artist’s is ideal for this). Replace the guts into the metal taking care that any shrouds for the marker lights are in as the tachometer guts are lowered position. Align the screw and replace the screws. Clean the shroud and bezel, and replace.

re-bend the bezel tabs to the tachometer body.

Look at the loop of wire that through a plastic holder on the of the tachometer. This must be so that electricity flows the direction. You can. follow the until you find connections and them at that point.

Or. you can un-thread the white wire the plastic loop holder, and it correctly, reversed flow.

a small label to the backside of the housing stating the modification to earth, Date it and initial it.

the tachometer into the instrument re-attaching all wiring.

Ignition Wiring Reversal.


Look at the wiring on the ignition One side is probably marked SW ( SW and the other is probably marked CB ( C B reaker). Your ignition may be marked with a + (plus) and a (minus), instead of SW and CB, as it may have had the replaced at some time.

these wire connections. You test this arrangement at the of these swaps, to ensure the coil is wired correctly. If you got it the car will still run. but not as

Now go back to the battery, and connect the cable connection to the negative of the battery.

Polarizing Generator.

Great Wall Electric Cars

at the Generator. You should see a large wire and a smaller wire to a terminal marked F (for F Pull off the wire to the Field

Connect a short jumper to the large brown connection sure you have metal-to-metal Touch the jumper lightly / to the Field terminal on the generator. You see sparks, touch again sparks), and again (again sparks).

Now disconnect the jumper from the large brown and re-connect the Field terminal Your generator is now polarized.

Testing Ignition Coil Reversal.

You REALLY need to this. With the ignition engine off, pull a plug wire loose a spark plug. Place it back in place.

Now start the Hold a no.2 lead carefully in one hand. With the hand, pull the loosened plug wire slowly from the plug.

You shoud see a size spark jumping the wire to the plug. Now. place the sharpened lead of the pencil into the path of the you should see a flare of particles from the pencil lead the spark plug. If you see a flare of flying from the pencil TOWARDS the wire. you have the hooked up backwards.

Remove the lead from the spark Replace the wire. Shut the off, and re-reverse the coil wires and re-test. Get it right!

Why this matter? If you got this you will be losing about 50% of voltage at the spark plugs! spark!

Essentially, if the ignition low coil wiring is reversed, the will. pull spark, than. push the spark. prefer to leave a high-temperature energy) surface (like the electrode of the spark plug) than a low-temperature (low surface (like the arm of the spark More voltage (more is available if the electrons move in the direction, in the direction they from the high-temperature center of the spark plug to the (relatively) arm of the spark plug.

Test it! Get it right!

Big Finish!

car is now wired for negative ground earth) electrics. You can install a new tape player, CD player, detector, or even plug into your cigar without worrying about components.

Glenn Wallace me with the diagram below, with calibration instructions. Glenn.

And here is a link to a good instructional page for the Smiths Tachometer from the Tiger Website. Very

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