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Heavy-Duty Truck Electrical Parts

Not sure which part you need? Use our parts-request checklist.

Keep your Class 8 truck powered and reporting clean with heavy-duty truck electrical parts built for the road. This category covers the chassis and cab wiring components that keep starting, charging, lighting, and sensor circuits alive — sensors, switches, relays, solenoids, connectors, terminals, and harness hardware for hard-working diesel rigs.

Not sure which part fits your truck? We cross-reference OEM, competitor, and superseded numbers so you order the right component the first time. JAK'S Diesel ships in-stock parts same-day, with free freight on orders over $1,000. Call or text (720) 445-6249.

Showing 36 of 632 Heavy-Duty Truck Electrical Parts
730385OEM Peterbilt MODULE
730385OEM Peterbilt MODULE
Catalog refs: PETERBUILT Q27-6051-001 · PAI 730385OEM
JAK'S JAKS-730385OEM
In Stock · Ask About Same-Day Shipping
$391.82
492102 CAMSHAFT FOLLOWER
International / Navistar · Models: DT466E / DT530E
492102 CAMSHAFT FOLLOWER
Catalog refs: MACK 4333-1820697C2 · NAVISTAR 1820697
JAK'S JAKS-492102
Available to order · Confirm dispatch
$23.32
492101 OIL PAN
492101 OIL PAN
Catalog refs: MACK 4333-1807917C1 · MACK 4333-1819649C1
JAK'S JAKS-492101
Available to order · Confirm dispatch
$24.82
ESO-1171 SOLENOID
ESO-1171 SOLENOID
Catalog refs: MACK 805GC213A · MACK 805GC27
JAK'S JAKS-ESO-1171
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845061 WIRE HARNESS
845061 WIRE HARNESS
Catalog refs: MACK 20960348 · MACK 41MR31639M
JAK'S JAKS-845061
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EM14970 Universal Use COIL
EM14970 Universal Use COIL
Catalog refs: MACK 2132-1949109 · MACK 2132-1974478
JAK'S JAKS-EM14970
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EM14890 Mack STARTER
EM14890 Mack STARTER
Catalog refs: MACK 2132-1114703 · CATERPILLAR 4N8253
JAK'S JAKS-EM14890
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EM14900 Mack STARTER
EM14900 Mack STARTER
Catalog refs: NAVISTAR 997938 · NAVISTAR 997938R91
JAK'S JAKS-EM14900
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EM14880 Mack ASET ENGINE STARTER
Mack · Models: ASET
EM14880 Mack ASET ENGINE STARTER
Catalog refs: MACK 2132-10461334 · MACK 2132-19011500
JAK'S JAKS-EM14880
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EM14860 Mack STARTER
EM14860 Mack STARTER
Catalog refs: CATERPILLAR 0R4261 · MACK 8MJ4239M
JAK'S JAKS-EM14860
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EM14870 Mack STARTER
EM14870 Mack STARTER
Catalog refs: MACK 2132-1990426 · MACK 2132-1990428
JAK'S JAKS-EM14870
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EM14610 Volvo ALTERNATOR
EM14610 Volvo ALTERNATOR
Catalog refs: MACK 2MJ4139M · MACK 2MJ4135AM
JAK'S JAKS-EM14610
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