Transcription

1967-1968CamaroInstallation Manual

Table of ContentsTable of Contents . IIWelcome to the Team of Classic Instruments! . IIIRemove Original Instrument Panel . 1Determine Speedometer Signal. 2Wiring the Speedometer . 3Determine Tachometer Signal . 5Wiring the Tachometer . 6Wiring the Temperature Gauge . 7Wiring the Oil Pressure Gauge . 8Wiring the Fuel Level Gauge . 9Wiring the High Beam Indicator. 9Wiring the Turn Signals . 9Wiring the Dash Lights . 9Instrument Panel Wire Harness . 10Calibrating the Speedometer . 11SN16 Pulse Signal Generator Signal . 11SN74 Speedometer Signal Interface Signal . 1216-Pulse Speedometer 16,000 PPM Calibration Chart . 15Mount New Instrument Panel . 16Revised: September 13, 2013

Welcome to the Team of Classic Instruments!Our congratulations and appreciation for your purchase of the finestquality set of specialty instruments ever produced! Your instrument set hasbeen conceived, designed, and manufactured by Classic Instruments, Inc. inthe U.S.A. Each instrument has been tested and certified for accuracy andquality before packaging and shipping.For trouble-free installation and operation, follow the instructionsexactly as outlined.Your instruments were assembled to precisespecifications and although each has a five (5) year warranty coveringdefective parts and workmanship – this warranty will not cover instruments orsending units which have been installed incorrectly.Follow our recommended procedures for installation and proper hookupto maintain the value and appearance of your instrument set during manyfuture years of accurate and dependable service!SPECIAL NOTES:Due to rapid changes in technology, some instruments may not beincluded in this manual. In this situation please refer to special instructionsheets and stickers located on your instrument. Please call us at 1-800-5750461 with any questions.Follow our instructions to guarantee trouble-free installation and correctoperation. Our installation instructions and procedures should take priorityover instructions furnished by any other manufactures of ignition systems,wiring harnesses, gauges, etc.TECHNICAL ASSISTANCE1-800-575-0461ORVisit our new website for the latest in gauge designand updates to our installation manual at:www.classicinstruments.comRevised: September 13, 2013

Remove Original Instrument PanelStep1:Disconnect the battery before beginning thereplacement of the old instrument panel.Step 2:Remove the 7 screws holding the instrument panel tothe dash. Three screws are located at the top of theinstrument panel and four screws are located at thebottom of the instrument panel. Save these screws touse when installing the new instrument panel.Step 3:Unplug the old instrument panel wire harness from thevehicle wire harness.Step 4:Remove the two screws holding the high beamindicator light assembly and remove the assembly fromthe old instrument panel. Save the screws and lightassembly to install on the new instrument panel.Step 5:Remove the old instrument panel from the dash.See Figure A BelowFigure A: Instrument panel dash mounting screw locationsRevised: September 13, 2013

Determine Speedometer SignalDetermine where you are going to get the speed signal for yourspeedometer.If your transmission has a fitting for a mechanical speedometer cable, youwill need a pulse signal generator. The GM style pulse signal generator (part#SN16) is shown below in Figure B. The SN16 produces 16 pulses perrevolution and a 12V square wave signal.If your transmission has a built-in electric vehicle speed sensor (VSS) orcomputer (ECM), a speedometer signal interface is required, shown below inFigure C.RedBlackWhiteRed:Black:White: 12VDCGroundSignalFigure B: GM style pulse signal generator [SN16]SN74Classic Instruments Inc.SPEEDOMETERSIGNALINTERFACEPOWERGROUNDSENSOR PWRSENSOR cinstruments.comSW#1 Input Type#2 Sensitivity#3 Output Type#4 not usedON1 2 3 4LED#1 ADJ#2 AUTO1 & 2 reset12Figure C: Speedometer signal interface [SN74]Revised: September 13, 2013

Wiring the SpeedometerStep 1:Connect 12VDC from the accessory side of the ignitionswitch to the Pink/White wire on the speedometer connector(position F) of the instrument wire harness. If accessory ofignition is not available, connect to a switched and dedicatedfuse on the fuse panel. This will help prevent interference tothe speedometer from the power source.Step 2:Connect the red wire from the pulse signal generator OR“Power” from the SN74 to the Purple/White wire on thespeedometer connector (position C) of the instrument wireharness.Step 3:Connect a dedicated chassis ground (i.e. don’t stack withany other ground wires) to the black/white wire on thespeedometer connector (position E) of the instrument wireharness. This will help prevent interference to thespeedometer from the ground.Step 4:Connect the black wire from the pulse signal generator OR“Ground” from the SN74 to the Yellow wire on thespeedometer connector (position A) of the instrument wireharness.Step 5:Connect the white wire from the pulse signal generator OR“Output” from the SN74 to the Purple wire on thespeedometer connector (position B) of the instrument wireharness.Step 6:If using the SN74 speed signal interface:Connect one wire of the transmission VSS to theSN74 “Sensor Gnd” and the other wire of thetransmission VSS to the SN74 “Input”.ORConnect the speed signal wire from the ECM/PCMto the SN74 “Input”.Revised: September 13, 2013

SN74Classic Instruments Inc.SPEEDOMETERSIGNALINTERFACEPOWERGROUNDSENSOR PWRSENSOR cinstruments.comSW#1 Input Type#2 Sensitivity#3 Output Type#4 not usedON1 2 3 4LED#1 ADJ#2 AUTO1 & 2 reset21To Purple/White harness wire1, 2 ON3, 4 OFFTo Yellow harness wireFrom ECM/PCM speed signalTo Purple harness wireTo pushbuttonTo pushbuttonECM/PCM Speed Signal WiringSN74Classic Instruments Inc.SPEEDOMETERSIGNALINTERFACEPOWERGROUNDSENSOR PWRSENSOR cinstruments.comSW#1 Input Type#2 Sensitivity#3 Output Type#4 not usedON1 2 3 4LED#1 ADJ#2 AUTO1 & 2 reset12To Purple/White harness wire1, 2, 3, 4 OFFTo Yellow harness wireFrom VSS low signalFrom VSS high signalTo Purple harness wireTo pushbuttonTo pushbuttonElectronic VSS Speed Signal WiringTo Purple/White Harness WireRedBlackWhitePulse Signal Generator WiringRevised: September 13, 2013To Yellow Harness WireTo Purple Harness Wire

Determine Tachometer SignalSTANDARD POINTS & CONDENSER SYSTEMSignal comes from the negative side of the coil (usually marked as “-“).GMC – HEI (High Energy Ignition System)Signal comes from the “TACH” terminal on coil side of distributor cap.MSD (Multiple Spark Discharge System)Signal comes from the TACH post on the MSD box. If there isn’t a MSD box,the signal comes from the negative side of the coil. If the tachometer doesnot respond correctly, your MSD system may require a MSD TACH adapter.Part No. 8910 or 8920. Contact MSD to find out which adapter you shoulduse for your application.VERTEX MAGNETO SYSTEMSignal comes from the “KILL” terminal on side the of Vertex magneto body.An external adapter such as an MSD Pro Mag Tach Converter #8132 may berequired.ACCEL IGNITION COILSSignal comes from the negative side of the coil. CAUTION! Some Accelignition coils require the tach signal wire to be connected to the “ ” terminalon the coil! PLEASE carefully read Accel’s instructions before connectingignition coil.MALLORY IGNITIONSignal comes from the negative side of coil (usually marked as “-“).IMPORTANT! Some Mallory ignition systems produce a 4-cylindertachometer signal (rather than an 8-cylinder signal) even if the engine is an8-cylinder. This may require the use of a special tachometer interface(contact Classic Instruments for details).ECM TACHOMETER SIGNALSignal comes from the computer. When using this type of signal, you mayneed to install a tachometer signal converter (part number SN76) to makethe tachometer accurate.NOTICE:For all other ignition systems please look at the owner’smanual for that system.Revised: September 13, 2013

Wiring the TachometerStep 1:Connect a switched 12VDC source to the Pink wire on thepower/lighting connector (position H) of the instrument wireharness.Step 2:Connect a good chassis ground to the Black wire on thepower/lighting connector (position J) of the instrument wireharness.Step 3:If your tachometer signal does NOT come from a computer,connect the tachometer signal to the White wire on thesignal connector (position J) of the instrument wire harness.ORIf your tachometer signal comes from a computer, connectthe tachometer signal from the computer to the white wire ofthe SN76, connect the red wire of the SN76 to the Pink wireon the power/lighting connector (position H), connect theblack wire of the SN76 to the Black wire on thepower/lighting connector (position J) and connect the yellowwire of the SN76 to the White wire on the signal connector(position J). See Figure D below for a SN76 wiring diagram.BlackWhiteGround - Black wire [Position J]on power/lighting connectorFrom ECM Tach Signal12VDC Switched - Pink wire[Position H] on power/lightingconnectorRedSignal - White wire [Position J]on signal connectorYellowSN-76Figure D: Optional SN76 wire diagramRevised: September 13, 2013

Wiring the Temperature GaugeStep 1:Install the Classic Instruments temperature sender in theintake manifold of the engine. The threads of the sender aretapered and should not require additional sealant. Do notuse Teflon tape on the threads of the sender. If necessary,a small amount of liquid Teflon pipe sealer may be used. Agood ground is essential between the temperature senderand the engine block for proper gauge operation. Use ofTeflon tape on the sender threads may degrade the groundcontact between the sender and the engine.Step 2:Connect the temperature sender to the Dark Green wire onthe signal connector (position A) of the instrument wireharness. See Figure E below.Step 3:The temperature gauge uses the same power and groundused for the tachometer. If you have already connectedthem, no other connections are necessary. Otherwise, seestep 1 & 2 of wiring the tachometer section.NutLock WasherRing TerminalBrass WasherNylon WasherSignal WireIntake ManifoldFigure E: Connecting the temperature senderRevised: September 13, 2013

Wiring the Oil Pressure GaugeStep 1:Install the Classic Instruments oil pressure sender in theengine block. GM engine installations require the use of the2-piece brass bushing kit which includes a 45 degree elbowand 1 inch extension. The threads of the sender andbushing kit are tapered and should not require additionalsealant. Do not use Teflon tape on the threads of any part ofthe sender. If necessary, a small amount of liquid Teflonpipe sealer may be used. A good ground is essentialbetween the oil pressure sender and the engine block forproper gauge operation. Use of sealants on the senderthreads may degrade the ground contact between thesender and the engine.Step 2:Connect the oil pressure sender to the Dark Blue wire on thesignal connector (position B) of the instrument wire harness.See Figure F below.Step 3:The oil pressure gauge uses the same power and groundused for the tachometer. If you have already connectedthem, no other connections are necessary. Otherwise, seestep 1 & 2 of wiring the tachometer section.NutRing TerminalLock WasherWasherSignal WireOil Pressure Sender45 ElbowEntensionFigure F: Connecting the oil pressure senderRevised: September 13, 2013

Wiring the Fuel Level GaugeStep 1:The fuel level gauge in your instrument cluster is designed towork with the stock fuel sending unit in your 1967 – 1968Camaro. The stock fuel level sender generates a resistancerange of 0 ohms at empty and 90 ohms at full. Connect thestock fuel level signal to the Tan wire on the signal connector(position D) of the instrument wire harness.Step 2:The fuel level gauge uses the same power and ground usedfor the tachometer. If you have already connected them, noother connections are necessary. Otherwise, see step 1 & 2of wiring the tachometer section.Wiring the High Beam IndicatorStep 1:Mount the vehicle’s high beam indicator assembly to the newinstrument panel using the 2 screws removed from theassembly of the old instrument panel.Step 2:Connect the Light Green wire on the signal connector(position E) of the instrument wire harness to the high beamindicator’s 12 volt signal wire.Wiring the Turn SignalsStep 1:Connect the vehicle’s right turn signal wire to the Dark Bluewire on the signal connector (position G) of the instrumentwire harness.Step 2:Connect the vehicle’s left turn signal wire to the Light Bluewire on the signal connector (position F) of the instrumentwire harness.Wiring the Dash LightsStep 1:Connect the vehicle’s dash light power wire to the Grey wireon the power / light