PacificBlueGTS
Scosche TA-03 Harness Noise Mod
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PacificBlue
What is VVTL-i ? password: sashimi
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(update 1/05: fits 2000 & up GT's & GTS's w/optional Premium 3-in-1 AM/FM ETR/Cassette/CD w/8 spkrs & separate amp) (update 7/07: Latest notes on the new TA-03B Harness, BestKits.com BHA8113 harness, Metra TYTO01 harness) 1) Some time ago the original Scosche TA-03 was superceded by a newer TA-03B harness which uses a different connector that
has an extended shell covering the pins, making it more difficult to mod.
2) When selecting resistor values from the Termination Resistor Table for the newer TA-03B, add +16% to the value from the table, or use the following calculator to find the exact value, substituting 2200 ohms for R1 (the TA-03A uses 1900 phms for R1): 3) There are many wiring harnesses out there which claim to be compatible with the 00-02 / 03-05 Celica's but members have discovered are not compatible. We know the original TA-03 was the easiest to modify and absolutely works, as well as the newer TA-03B, even though it's a bit more difficult to mod. We also know the BestKits.com BHA8113 Harness http://bestkits.com/i/BHA8113-new.jpg also works, and may still have the original Scosche TA-03 style connector that's easier to work with. 4) Recently members have been asking me about a new harness called the Metra TYTO01 http://www.circuitcity.com/ssm/Metra-Toyot...roductDetail.do At this time all I can say is that it looks like it might work with later JBL-equipped vehicles which use the Toyota databus to control Turn-On. Other than that, I don't know yet whether it needs the mod or not. Note: Metra does not list any Celica's in their TYTO01 compatibility table. (update 8/07: BestKits BHA8113 identical to TA-003 Original) 1) Confirming: the BestKits.com BHA8113 Harness is identical to the discontinued original TA-03 harness, including long pins
making it easy to modify compared with the newer Scosche, so I'd recommend you use the BHA8113 instead of the Scosche TA-03B.
2) If your HU only has two RCA outs (L&R) you can use an RCA Y-Cable to connect to the StockAmp's Rear RCA's, but you'll need to roughly double the value of the termination resistors to avoid double-terminating the signals. For example if the table says use 600 ohms, use 1000-1200 ohms instead. PacificBlue |
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Remove heatshrink from audio pins (notice hidden resistors in black shrink, also 4 new resistors
in front
Back of TA-03 showing 4 audio pins - (Red Wire is Right Channel & Top Row is Front)
Unsolder the 4 RCA wires from the connector pins and twist termination resistors onto them before
soldering
Add heatshrink tubing (yel) to prevent shorts & add structural support, then tin the ends and
solder em back to the pins
Add more heatshrink (blu) then twist the ends of the resistors together and tin with solder
Add larger heatshrink to Analog GND wire (blk/wht making U-turn) & solder it to the twisted end
of the resistors
After applying heatgun to shrink tubing - (Top Row is FRONT Left & Right)
Another closeup showing the new resistors bulging out from the blue shrink tubing
Completed Mod - tie-wrap all power leads together, then separately tie-wrap all audio & gnd's
together
#16 guage heavy-duty flexible copper wire (GRN) from the Celica's dash frame to the back of my HU.
Scosche TA-03 FactoryAmp Noise Fix Mod - Basic Pictorial Diagram & Notes
Click Here: EvilED's factory amp mod Click Here: to go back to the original nc.org thread Curious what the Scosche TA-03 Harness sounds
like -without- the mod?
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