Automotive Wire & Wiring Guide from TESSCO

Automotive Wiring Guide from TESSCO Installation of wireless devices, audio, emergency equipment, or other accessories in a vehicle can sometimes be a daunting task. With TESSCO's exclusive Wireless Solutions® installation accessories, you'll get the highest quality at competitive prices for a good job the first time.

View Full Automotive Wire Selection
Use the "Filter Search Results" button to quickly find your exact wire.

New! Wireless Solutions Mini-ATM Low Profile Fuses.

More and more auto manufacturers are using the new Mini-ATM, Low Profile fuses in their vehicles. These fuse use less space and are ideal for the limited space requirements in new vehicles. Stock up on these handy 10 packs in 5, 7.5, 10, 15, 20, 25, and 30 Amps.

Wireless Solutions is high quality at low prices.

Get Noticed With Vehicle Strobe Lights

Installed Car Strobe Lights Wireless Solutions Remote Strobe Power Kits can be installed in any vehicle by drilling a 1" hole to place the grommet mounted strobe lights. Both the 4 bulb and 6 bulb kits have a power pack capable of handling 6 bulbs. The kits come with everything needed except a switch. They are brighter and more effective than "wig-wag" halogen flashing lights. The bulbs are easy to install and are built to take road punishment.

Run Speaker Wire Anywhere

If you need to run speaker wire in small areas, such as along molding, baseboards, or under carpet, JSC Flat speaker wire is the solution you have been looking for. It’s braided conductors and flexibility make it ideal for those difficult installations. View TESSCO's full line of speaker wire.

Typical Low Voltage Wire Sizes

Air Conditioning- 10 GAUGE	Heater Switch- 10 GAUGE
Alternator- 10 GAUGE	Horn Button- 13 GAUGE
Ammeter- 10 GAUGE	Horn To Relay- 10 GAUGE
Cigarette Lighter- 14 GAUGE	Ignition Switch – 12 GAUGE
Clock- 18 GAUGE	Low-Amps Circuits- 18 GAUGE
Coil Wire- 16 GAUGE	Parking Lights- 16 GAUGE
Dome Lights- 16 GAUGE	Radio To Fuse Blocks- 14 GAUGE
Driving Lights- 14 GAUGE	Single Bulbs- 18 GAUGE
Gauges- 14 GAUGE	Starter To Relay- 16 GAUGE
Generator (Charging)- 10 GAUGE	Stoplights- 16 GAUGE
Generator To Starter- 16 GAUGE	Tail Lights- 16 GAUGE
Headlight Circuit- 14 GAUGE	Turn Signals- 16 GAUGE
Headlight Switch To Fuse Block- 12 GAUGE	CD To Fuse Block- 14 GAUGE
Heater Leads- 16 GAUGE	Windshield Wiper & Washer- 14 GAUGE

For safety and best results— When circuit is longer than 10 feet, always use the next larger gauge size, which is the next lower even number.

Wire Gauge Selection Table 12 Volt Circuit

AMPS	3'	5'	7'	10'	15'	20'	25'
0 to 5	18	18	18	18	18	18	18
6	18	18	18	18	18	18	18
7	18	18	18	18	18	18	18
8	18	18	18	18	18	16	16
10	18	18	18	18	16	16	16
11	18	18	18	18	16	16	14
12	18	18	18	18	16	16	14
15	18	18	18	18	14	14	12
18	18	18	16	16	14	14	12
20	18	18	16	16	14	12	10
22	18	18	16	16	12	12	10
24	18	18	16	16	12	12	10
30	18	16	16	14	10	10	10
40	18	16	14	12	10	10	8
50	16	14	12	12	10	10	8
100	12	12	10	10	6	6	4
150	10	10	8	8	4	4	2
200	10	8	8	6	4	4	2

Fuses Available from TESSCO

Fuses
AGC		ATC			ATM			MAXI ATC
Amps	Part #	Amps	Part #	PKG	Amps	Part #	PKG	Amps	Part #
.1	71407	1	65663	10	2	53419	100	20	485827
.5	34375	2	63948	100	3	420803	10	30	460814
1	35603	3	86545	10	4	492850	10	40	459880
2	22389	5	422805	10	5	460824	10	50	495857
3	60782	7.5	493852	10	7.5	499867	10	60	441835
4	99175	10	458839	10	10	494818	10
5	47568	15	488801	10	15	498851	10
6	42100	20	495867	10	20	447825	10
7.5	34354	25	410882	10	25	439816	10
8	72747	30	472809	10	30	445876	10
10	10424	40	443804	10
15	87210
20	73996
25	54668
30	63306

For more information contact TESSCO
at 800-472-7373 or by email.