Electical Help 2001 EZ GO PDS

Jack12002

In the process of putting my cart back together after cleaning the rust off the battery cage. Decide to jazz it up. I installed Scottyb's controller upgrade, now i am looking for some guidence on the electrical upgrades.


o I HAVE A 36 VOLT REDUCER
o A RADIO
o Scottys digital VOLT METER
o HEAD LIGHTS
o POSSIBLY TAIL LIGHS
o A THREE POSITION KEY SWITCH
I WAS THINKING ABOUT USING THE KEY SWITCH TO TURN ON THE VOLTAGE REDUCER,THAT WOULD POWER THE VOLT METER AND RADIO. I WOULD LIKE TO KEEP THE PRESETS IN THE RADIO SO I THOUGHT I WOULD PULL POWER FROM TWO BATTERIES JUST FOR THE MEMORY POWER. I was planning on a switch for the lights. Could anyone help me with the wiring?

BGW

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Jack12002

Can any one help on this?
Thanks

JohnnieB

What radio and what Voltage reducer?

Some radios store presets in NVRAM or flash memory, others lose user settings when power is disconnected.

Jack12002

Johnny,
It is a 36 volt to 12 volt reducer, the radio needs 12 volts to hold presets, i was going to run a wire from two batteries just for the presets, by passing the voltage reducer. Thats what i was thinking anyway. I seem to see a lot about relays in readiong things here not sure why you would need one. Ithought the 3 postion key switch would turn power on to the voltage reducer to power every thing.
Thanks for you help Johnny, i enjoy reading you comments even though i only understand half of what you say.

yurtle

Does your reducer have a common negative for both 36 volts and for 12 volts? Remember, your radio will have a common negative for both the power and memory.

Jack12002

You are bidding on a 36 volt heavy duty voltage reducer to a usable 12 volts for lights ,radio, and any other application that requires 12 volts. The reducer puts out 20 amp 12 volt. This will work on any thing needing to reduce voltage golf carts, ect. These are brand new and work very well. I use them in our golf car light applications. Please note when you first hook up the input wires to the battery you will see a arch and hear a snap but its nothing to worry about as its just powering up the voltage reducer. Make sure when hooking up to a ezgo or other golf cart that has a toggle switch for maintainace it is in the off position because the arch in the run position could burn out the controller. Call me at 224-650-1700 with any questions you may have before you buy or send an ebay message. Measurements are 8 x 4.5 x 2.25 inches.

Important Instructions

Output: Green goes to 12v positive accessories (as stated), Black goes to 12v negitive and also goes to 36v negitive side ( Note the connector adding a black - wire to go to battery NOT INCLUDED ) of the battery pack. Not included because there are many different applications with different carts and lengths.
Input: Red goes to 36v postive side of the battery pack(as stated) and Yellow is the trigger(control) and also needs to be connected to a 36v postive source whether it be a key or toggle switch or to the battery. After wiring the unit this way, you will see 12vdc on your multi-meter.

http://www.ebay.com/itm/36-12-VOLT-V...item2c69da1b10

This is what i have.

JohnnieB

Don't worry about it, I don't understand half of what I say.

The voltage reducer you linked to, has a remote on/off (Yellow wire), so you don't need to use a relay to turn it on/off with the keyswitch. (Basically, you are doing the same thing, only the relay is already built into the reducer.)

Since the voltage reducer and battery pack share a common negative, bypassing the reducer with 12V from a couple batteries in the pack will cause smoke and fire when the reducer turns on.

You could do it with a couple steering diodes, but you'd still end up with an imbalanced battery pack because you'd be drawing more power out of two of the batteries. Granted, the radio won't be drawing much power in standby, but it will be drawing it 100% of the time, so it will eventually imbalance the pack.

Personally, I'd stash a small (2AH-4AH or so) gel-cell or sealed lead-acid battery someplace close to the radio, connect it in parallel to the radio's 12V input from the voltage reducer and add a steering diode in series with the positive lead from the reducer so the small battery wouldn't back feed to other accessories when reducer was off.

The voltage reducer would be charging the small battery whenever the key was on, so there would be little, if any, need to charge the small battery separately. Of course, it wouldn't charge it fully because the reducer output is only about 12V, but my guess is that it probably would last as long as the batteries in the battery pack, so just replace it when you replace them.


I'm not sure what the radio's amp draw is when in standby, but if it was only a few milli-amps, something like this could be used instead of a small battery.
http://www.walmart.com/ip/Soundquest...ndingMethod=rr

Jack12002

Johnnie,
How would I wire the soundquest capacitor in the system? Same as the extra battery? Would it need a steering diode? Could you also describe how I should wire everything.
Thanks for you help.
Jack

JohnnieB

How many amps does the radio draw when it is turned on?
(Make and model of radio would be helpful.)

Jack12002

Johnnieb,

it is a Kenwood KDC-BT752HD.
Specifications FM tuner section Frequency range (200*kHz space): 87.9 MHz — 107.9 MHz Usable sensitivity (S/N = 26*dB): 9.3 dBf (0.8 μV/75 Ω) Quieting sensitivity (DIN S/N = 46*dB): 15.2 dBf (1.6 μV/75 Ω) Frequency response (±3*dB): 30 Hz — 15 kHz Signal-to-Noise ratio (MONO): 70 dB Stereo separation (1*kHz): 40 dB Digital FM tuner section Frequency range (200*kHz space): 87.9 MHz — 107.9 MHz Frequency response (±3*dB): 20 Hz — 20 kHz Signal-to-Noise ratio (STEREO): 70 dB AM tuner section Frequency range (10*kHz space): 530 kHz — 1,700 kHz Usable sensitivity (S/N= 20*dB): 28 dBμ (25 μV) Digital AM tuner section Frequency range (10*kHz space): 530 kHz — 1,700 kHz Frequency response (±3*dB): 40 Hz — 15 kHz Signal-to-Noise ratio (STEREO): 70 dB CD player section Laser diode: GaAIAs Digital filter (D/A): 8 Times Over Sampling D/A converter: 24 Bit Spindle speed: 500 rpm — 200 rpm (CLV) Wow & Flutter: Below Measurable Limit Frequency response (±1 dB): 10 Hz — 20 kHz Total harmonic distortion (1 kHz): KDC-X796: 0.008 % KDC-BT752HD: 0.01 % Signal-to-Noise ratio (1 kHz): KDC-X796: 110 dB KDC-BT752HD: 105 dB Dynamic range: 93 dB AAC decode: AAC-LC “.m4a” files MP3 decode: Compliant with MPEG-1/2 Audio Layer-3 WMA decode: Compliant with Windows Media Audio USB interface USB standard: USB1.1/ 2.0 (Full speed) Maximum supply current: DC 5 V 1 A File system: FAT16/ 32
AAC decode: AAC-LC “.m4a” files MP3 decode: Compliant with MPEG-1/2 Audio Layer-3 WMA decode: Compliant with Windows Media Audio Bluetooth section Technology: Bluetooth Ver. 3.0 Certified Frequency: 2.402 – 2.480 GHz Output Power: +4 dBm (MAX), 0 dBm (AVE) Power Class 2 Maximum Communication range: Line of sight approx. 10m (32.8 ft) Profile: HFP (Hands Free Profile), HSP (Headset Profile), SPP (Serial Port Profile), OPP (Object Push Profile), PBAP (Phonebook Access Profile), A2DP (Advanced Audio Distribution Profile), AVRCP (Audio/Video Remote Control Profile) Audio section Maximum output power: 50 W × 4 Full bandwidth power (at less than 1 % THD): 22 W × 4 Speaker impedance: 4 Ω — 8 Ω Tone action: Bass: 100 Hz ±8 dB Middle: 1 kHz ±8 dB Treble: 12.5 kHz ±8 dB Preout level / load (CD): KDC-X796: 4,000 mV/ 10 kΩ KDC-BT752HD: 2,500 mV/ 10 kΩ Preout impedance: ≤ 600 Ω Auxiliary input section Frequency response (±3 dB): 20 Hz — 20 kHz Input maximum voltage: 1,200 mV Input impedance: 10 kΩ General Operating voltage: 14.4 V (10.5 V — 16 V allowable) Maximum current consumption: 10 A Installation size (W × H × D): 182 mm × 53 mm × 160 mm (7-3/16” × 2-1/16” × 6-5/16”) Weight: 2.9 lbs (1.3 kg)
Subject to change without notice.